Here we look at squaring expressions that involve radicals because people tend to make some common mistakes while solving such expressions. Take 5 times the square root of y quantity squared, the answer here is not 5y. Here's the reason, square means to multiply something with itself so the square of 5 root y would be 5 root y into 5 root y. So 5 x 5 is 25 and under root y into under root y equals just y so the answer will be 25y.
Now take under root of (x3) being added into 7 quantity squared. This will not be x3+49. The reason for this is that you can't distribute a square over addition. Now the same principle will apply here, both under root of (x3) and 7 have to be multiplied separately to under root of (x3) added into 7 with a plus sign in the middle. It will be simplified to a three term answer with the radical still there.
How To: Square expressions involving radicals
 Hot
 Latest

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Find a number given Its percent

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the slope of a line given 2 points with fractions

How To: Find the standard deviation with the ZScore formula

How To: Figure out the domain & range of a piecewise function

How To: Find the formula of a piecewise function given a graph

How To: Complete a proof involving segments

How To: Find extra points for a parabola (quadractic equation)

How To: Isolate a variable

How To: Calculate the area of a parallelogram

How To: Find density using the water displacement method

How To: Rotate a shape about the origin 90° counterclockwise

How To: Identify characteristics of a sample during a survey

How To: Find a missing side of a triangle, similar to another

How To: Write a slopeintercept equation given an XY table

How To: Find the opposite and absolute value of a number

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Find a number given Its percent

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the slope of a line given 2 points with fractions

How To: Find the standard deviation with the ZScore formula

How To: Figure out the domain & range of a piecewise function

How To: Find the formula of a piecewise function given a graph

How To: Complete a proof involving segments

How To: Find extra points for a parabola (quadractic equation)

How To: Isolate a variable

How To: Calculate the area of a parallelogram

How To: Find density using the water displacement method

How To: Rotate a shape about the origin 90° counterclockwise

How To: Identify characteristics of a sample during a survey

How To: Find a missing side of a triangle, similar to another

How To: Write a slopeintercept equation given an XY table

How To: Find the opposite and absolute value of a number
Be the First to Comment
Share Your Thoughts