Question

Simplify. (4x2 + 7x - 5) - (3x2 - 2x - 4)
a: x2 + 9x - 1
b: -x2 + 5x + 1
c: -x2 - 9x - 9
d: 7x2 + 5x - 9

Answer 1

look at the first and last terms in each bracket

add the first pair
that will give you the first term in the answer
add the last pair - that will give you the last term in the answer

there is only one answer that works

Answer 2

ok

Answer 3

make sure you allow for the - sign

Answer 4

it's b

Answer 5

I'm afraid that is not correct

allow for th e- sign

the first pair are 4x^2 - 3x^2