Question

(-2x^3)×(5x^2)
(-6x^6):(-3x^4)
(-4x^3) totul la a 2
3x(x^2-4x)+(3x^2-x)×(5-x)

Answer 1

a)=(-10x^5)
b)=2x^2
c)=(-4)^2×(x^3)^2=16x^6
Succes

Answer 2

$- 2 {x}^{3} \times 5 {x}^{2} = ( - 2 \times 5) {x}^{3 + 2} = - 10 {x}^{5}$

$- 6 {x}^{6} \div ( - 3 {x}^{4} ) = [ - 6 \div ( - 3)] {x}^{6 - 4} = 2 {x}^{2}$

${( - 4{x }^{3} )}^{2} = {(-4)}^{2}\:\times\:{({x}^{3})}^{2}=16\:{x}^{6}$

$3x( {x}^{2} - 4x) + (3 {x}^{2} - x)(5 - x)$

$= 3 {x}^{3} - 12 {x}^{2} + 15 {x}^{2} - 3 {x}^{3} - 5x + {x}^{2}$

$= 4 {x}^{2} - 5x$