Question

What is the sum of the polynomials? (6x+7+x^2)+(2x^2-3)

a.-x^2+6x+4
b.3x^2+6x+4
c.9x + 4
d.9x^2+4

Answer 1

b.

`{ \tt{(6x + 7 + {x}^(2))(2 {x}^(2) - 3) }} \\ = { \tt{(2 + 1) {x}^(2) + 6x + (7 - 3) }} \\ = { \tt{3 {x}^(2) + 6x + 4 }}`