Question

Which choice is equivalent to the expression below? 4√7 – 3x√7 - x√7

a. 4√7 - 4x√7
b. -2x√7
c. -x^2
D. 0

Answer 1

a.

Explanation:

since the rootsvare equal we can add and subtract these expressions

`4 √(7) - 3x √(7) - x √(7) = 4 √(7) - 4x √(7)`