помогите 7 класс алгебра 30 балов дам
1)3b+bc+3ac+9a
2)a[tex] a^{2} y^{2} - x^{6} [/tex]
3)[tex] a^{3} - a^{2} b+3ac+9a[/tex]
4)[tex] x^{2} - b^{2} -ax-ab[/tex]
5)[tex] c^{2} -4c+4- 9^{2} [/tex]
6)[tex] 4c^{2} +20c+25- 9a^{2} [/tex]
7)[tex] y^{2} x+y+y x^{2} +x+4yx+4[/tex]
8)[tex] y^{2} x+y+y x^{2} +x+4yx+4[/tex]
9)[tex] x^{2} +x-xy- y^{2} + y^{3} -x y^{2} [/tex]
1)3b+bc+3ac+9a
2)a[tex] a^{2} y^{2} - x^{6} [/tex]
3)[tex] a^{3} - a^{2} b+3ac+9a[/tex]
4)[tex] x^{2} - b^{2} -ax-ab[/tex]
5)[tex] c^{2} -4c+4- 9^{2} [/tex]
6)[tex] 4c^{2} +20c+25- 9a^{2} [/tex]
7)[tex] y^{2} x+y+y x^{2} +x+4yx+4[/tex]
8)[tex] y^{2} x+y+y x^{2} +x+4yx+4[/tex]
9)[tex] x^{2} +x-xy- y^{2} + y^{3} -x y^{2} [/tex]
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1) 3b+bc+3ac+9a=b(3+c)+3a(c+3)=(b+3a)(3+c)2) a²y²-x⁶=(ay)²-(x³)²=(ay-x³)(ay+x³)
3) a³-a²b+3ac+9a=a(a²-ab+3c+9)
4) x²-b²-ax-ab=(x-b)(x+b)-a(x+b)=(x+b)(x-b-a)
5) c²-4c+4-9х²=(c-2)²-9х²=(c-2-3х)(c-2+3х)
6) 4c²+20c+25-9a²=(2c+5)²-9a²=(2c+5-3a)(2c+5+3a)
7) y²x+y+yx²+x+4yx+4=y(yx+1)+x(yx+1)+4(yx+1)=(y+x+4)(yx+1)
8) y²x+y+yx²+x+4yx+4=y(yx+1)+x(yx+1)+4(yx+1)=(y+x+4)(yx+1)
9) x²+x-xy-y²+y³-xy²=x(x+1-y)-y²(1-y+x)=(x-y²)(x+1-y)