The expression (4x2+6x+4)+(4x2−7x−7) equals x2+ x+

Question

The expression (4x2+6x+4)+(4x2−7x−7) equals 

 x2+ x+ 

Answer 1

Left hand side:

(4x^2 + 6x + 4) + (4x^2 - 7x - 7) = (4 + 4)x^2 + (6 - 7)x + (4 - 7) = 8x^2 - x - 3

The right hand side is incomplete, so this is as far as it goes.