Question

Extracting square roots 4x²-225=0

Answer 1

4x^2-225=O =>4x^2=225 =>x^2=225/4 =>x=root {(15×15)/(2×2)} =>x=15/2 So, x=7.5

Answer 2

Answer:

$x=\pm 7.5$

Step-by-step explanation:

Given : $4x^2-225=0$

To Find : Extracting square roots

Solution :

$4x^2-225=0$

$4x^2=225$

$x^2=\frac{225}{4}$

$x=\sqrt{\frac{225}{4}}$

$x=\pm\frac{15}{2}$

$x=\pm 7.5$

Hence square root is $x=\pm 7.5$