Question

What is the first step in solving the quadratic equation x^2-40=0
A. taking the square root of both side of the equation
B. adding 40 to both sides of the equation
C. squaring both sides of the equation
D. subtracing 40 from both sides of the equation

Answer 1

first step would be to add 40 to both sides
x^2 - 40 = 0...add 40 to both sides
x^2 = 40....then u would take the sqrt of both sides
x = (+ - )sqrt 40
x (+ - ) 2 sqrt 10

Answer 2

Answer:

Option B is correct

adding 40 to both sides of the equation

Step-by-step explanation:

Given the quadratic equation:

$x^2-40 = 0$

Addition property of equality states that you add a number to both sides of an equation.

Add 40 to both sides of an equation in [1] we have;

$x^2-40+40= 0+40$

Simplify:

$x^2=40$

Therefore, the  first step in solving the given quadratic equation is,  

adding 40 to both sides of the equation