What is the first step in solving the quadratic equationxa. taking the square root of both sides of the equationb. adding 40 to both sides of the equationc. squaring both sides of the equationd. subtracting 40 from both sides of the equation

B. adding 40 to both sides of the equation

x^2 - 40 = 0

x^2 = 40

x = ± √40

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^