Question

Which of the b values are solutions to the following equation?
b^2 = 2.56b

Answer 1

C and D

Explanation:

Given

b² = 2.56 ( take the square root of both sides )

b = ±
`√(2.56)` = ± 1.6

Then solutions are

b = - 1.6 → C

b = 1.6 → D

Answer 2

answer is D

Explanation:

as we need to cancel the square in b

so we add square root on both sides and square root of 2.56 is 1.6