Question

What must be added to 3x -7 to make x^2 + 4x -1?

Answer 1

@amistre64

Answer 2

3x - 7 + (y) = x^2 + 4x - 1
y = x^2 + 4x - 1 - 3x + 7

Answer 3

so it would be x^2 + x + 6

Answer 4

What about this one?

By how much does a^3 - 2a exceed a^2 + a - 6?

Answer 5

it would be
a^3 - 2a - (a^2 + a - 6)
= a^3 - 2a -a^2 - a + 6
= a^3 - a^2 - 3a + 6

Answer 6

Which one is it?

Answer 7

the answer
a^3 - a^2 - 3a + 6

Answer 8

The perimeter of a triangle is 7a - 11b. If two of its sides are 2a + b and a - 9b, what is the third side?

Answer 9

2a + b + a - 9b + (y) = 7a - 11b
y = 7a - 11b - 3a + 8b
y = 4a - 3b