Объяснение:
1)
a)х(а+b)-(a+b)=(a+b)(x-1)
б)x(m+n)-7(m+n)=(m+n)(x-7)
в)(ax+3x)-(2a+6)=x(a+3)-2(a+3)=(a+3)(x-2)
г)(2mx-3m)-(4x-6)=m(2x-3)-2(2x-3)=(2x-3)(m-2)
2)
3(y+4)-(y+4)²=0
(y+4)(3-y-4)=0
(y+4)(-y-1)=0
y1=(-4)
y2=(-1)
3)
15.5(20.8+9.2)-3.5(20.8+9.2)=15.5*30-3.5*30=30(15.5-
-3.5)=30*12=360
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Answers & Comments
Объяснение:
1)
a)х(а+b)-(a+b)=(a+b)(x-1)
б)x(m+n)-7(m+n)=(m+n)(x-7)
в)(ax+3x)-(2a+6)=x(a+3)-2(a+3)=(a+3)(x-2)
г)(2mx-3m)-(4x-6)=m(2x-3)-2(2x-3)=(2x-3)(m-2)
2)
3(y+4)-(y+4)²=0
(y+4)(3-y-4)=0
(y+4)(-y-1)=0
y1=(-4)
y2=(-1)
3)
15.5(20.8+9.2)-3.5(20.8+9.2)=15.5*30-3.5*30=30(15.5-
-3.5)=30*12=360