Question

x+(x+3)+x^2=75 Please help........ Everyone is giving me answers i know arent true...

Answer 1

x + (x + 3) + $x^{2}  $ = 75

so you will add up all of the x 's but NOT the x^2

2x + 3 + $x^{2}  $ = 75

Rearrange to put the x^2 in front of 2x

$x^{2}  $ + 2x + 3 = 75

subtract the 75 from both sides

$x^{2}  $ + 2x - 72 = 0