Question

3(2x-5y)=

-2x(x+3y)=

2(3x²-3)+(2x+1)(2-x)=

(5x-2)(3x-1)-3(x-1)(2x+3)=

2x²y-3xy+1=


pomocy

Answer 1

Szczegółowe wyjaśnienie:

a(b + c) = ab + ac

(a + b)(c + d) = ac + ad + bc + bd

(+) · (-) = (-)

(-) · (-) = (+)

[tex]3(2x-5y) = 6x-15y\\\\\\-2x(x+3y) = -2x^{2}-6xy\\\\\\2(3x^{2}-3)+(2x+1)(2-x) = 6x^{2}-6+4x-2x^{2}+2-x = 4x^{2}+3x-4\\\\\\(5x-2)(3x-1)-3(x-1)(2x+3)=15x^{2}-5x-6x+2-3(2x^{2}+3x-2x-3) =\\\\15x^{2}-11x+2-3(2x^{2}+x-3) = 15x^{2}-11x+2-6x^{2}-3x+9 = 9x^{2}-14x+11[/tex]

[tex]2x^{2}y - 3xy +1 =xy(2x-3)+1[/tex]