Question

Multiply:
(2x2 + 5xy - 8) by (7x2 - 2xy - 5)

Answer 1

Answer:

14x⁴+31x³y-66x²-10x²y²-9xy+40

Step-by-step explanation:

2x²(7x²-2xy-5)+5xy(7x²-2xy-5)-8(7x²-2xy-5)

14x⁴-4x³y-10x²+35x³y-10x²y²-25xy-56x²+16xy+40

14x⁴-4x³y+35x³y-10x²-56x²-10x²y²-25xy+16xy+40

14x⁴+31x³y-66x²-10x²y²-9xy+40