How do you simplify sqrt90 *sqrt 40 - sqrt 8 * sqrt 18?

2 Answers
Mar 30, 2017

=48

Explanation:

You can combine two roots into one if they are being multiplied or divided.

color(red)(sqrt90 xxsqrt40)-color(blue)(sqrt8xxsqrt18)

color(red)(sqrt3600)-color(blue)(sqrt144)" "larr now you can find the square roots.

=60-12

=48

48

Explanation:

sqrt(90) * sqrt(40) - sqrt(8) * sqrt(18) = sqrt(90 * 40) - sqrt(8 * 18)
sqrt(3600) - sqrt(9*2*2*4) = 60 - 3 * 2 * 2
= 60 - 12 = 48