Question

6. Multiplica los siguientes polinomios.
a. (5x2 – 3x)(2x - 8)
b. (80?6 - 5ebX-3db + 9ab2 - 4)
d. (2xy? - 7xy - Sx) (3x?y - 6xy + 4x)​

Answer 1

a. (5x² – 3x)(2x - 8)  = -24x²+ 24x

b. (80a³b - 5ab²)(-3a²b + 9ab² - 4)   = -240a⁵b² + 720a⁴b³-320a³b + 15a³b³-45a²b⁴-20ab²

d. (2xy² - 7xy - 5x) (3x²y - 6xy + 4x)​ = -9x³y³ + 2x²y + 50x²y²-6x²y³-21x³y² -20x²

a. (5x² – 3x)(2x - 8)

= 10x² - 40x² + 6x² + 24x

= -24x²+ 24x

b. (80a³b - 5ab²)(-3a²b + 9ab² - 4)

= -240a⁵b² + 720a⁴b³-320a³b + 15a³b³-45a²b⁴-20ab²

d. (2xy² - 7xy - 5x) (3x²y - 6xy + 4x)​

= 6x³y³-6x²y³+8x²y²-21x³y²+42x²y²- 28x²y - 15x³y³ + 30x²y -20x²

= -9x³y³ + 2x²y + 50x²y²-6x²y³-21x³y² -20x²