Question

$(2x {}^{2} + 5x)(2x {}^{2} + 5x - 19) + 84$
2​

Answer 1

Answer:

4x^4 + 20x^3 - 13x^2 - 11

Step-by-step explanation:

(2x^2 + 5x)(2x^2 + 5x - 19) + 84

= 4x^4 + 10x^3 - 38x^2 + 10x^3 + 25x^2 - 95 + 84

=  4x^4 + 20x^3 - 13x^2 - 11