Question

Efectuati :
a) - 4 × (-5x) =
b) -3x^2 × (-7x^3) =
c) -2ab × ( -4ab^2) =
d) 11x^2y × (-3xy) =
e) -8x^2 × (-9y) =
f)x^2y^2 × (-2yz^2) =

Answer 1

a) - 4 × (-5x) =   20x
b) -3x² × (-7x³) = 21x⁽²⁺³⁾=21x⁵
c) -2ab × ( -4ab²) = 8a⁽¹⁺¹⁾b⁽¹⁺²⁾=8a²b³
d) 11x²y × (-3xy) = - 33x⁽²⁺¹⁾y¹⁺¹⁾= - 33x³y²
e) -8x² × (-9y) = 72x²y
f)  x²y² × (-2yz²) = - 2x²y⁽²⁺¹⁾z²= - 2x²y³z²

Answer 2

a) = (-4)x(-5)X =20X
b) = (-3)x(-7)X^5 = 21X^5
c) = (-2)x(-4)a^2xb^3= 8a^2b^3
d) = 11x(-3) X^3Y^2 =-33X^3Y^2
e) = (-8)x(-9)X^2Y = 72X^2 Y
f) =-2X^2Y^3Z^2