Question

plz...help...
15.Simplify the following expressions and evaluate it when x = 1, y = -1
(5xy - 3x^2 + 2y^2) (5y^2 - 8xy + 3x^2) + 9x^3y – 8y^4 + 12x^4


{20pnts}​

Answer 1

Answer:

-101

Step-by-step explanation:

((5×1×-1)-(3×1^2)+(2×(-1)^2))((5×(-1)^2)-(8×1×-1)+(3×(1)^2+(9×(1)^3)-(8×(-1)^4)+(12×(1)^4)

=(-5-3+2)(5-(-8)+3)+(-9)-8+12

=-6×16-9-8+12

=-96-9-8+12

=-105-8+12

=-113+12

=-101