Question

Which quadratic equation is equivalent to (x + 2)2 + 5(x + 2) – 6 = 0?

(u + 2)2 + 5(u + 2) – 6 = 0 where u = (x – 2) u2 + 4 + 5u – 6 = 0 where u = (x – 2) u2 + 5u – 6 = 0 where u = (x + 2) u2 + u – 6 = 0 where u = (x + 2)

Answer 1

Answer: C

Explanation:

Took the test

Answer 2

we have

`(x+2)^(2) +5(x+2)-6=0`

Let

`u=(x+2)`

Substitute in the expression

`(u)^(2) +5(u)-6=0`

therefore

the answer is

`(u)^(2) +5(u)-6=0` is equivalent to
`(x+2)^(2) +5(x+2)-6=0`