<span>(3x+y)(2x-5y)-6(x-y)=6x^2-13xy-y^2*5-6*(x-y)=6x^2-13xy-y^2*5-(6x-6y)=6x^2-13xy-5y^2-6x+6y</span>
Решение в прикрепленных файлах
A) (4x+y)^2=16x^2+8xy+y^2
b) (4x–5rx)^2=16x^2–40rx^2+25r^2x^2
c) (–1/2y+1/5z)^2=1/4y^2 –1/5zy+1/25z^2
d) (–8d^3–7x)(8d^3–7x)= 49x^2–64d^6
e)(1,5x+5(2y^2))(–5(2y^2)+1,5x)=2,25x^2–100y^4
Ответ:
Объяснение:
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X+10-12=17
x+10=17-12
x+10=5
x=10+5
x=15