A.am+bm+c=m(a+b)+c | B.(x+2)(x-2)=x2-4 |
C.x2-9=(x+3)(x-3) | D.8a2b3=2a2•4b3 |
1 |
4 |
A.a(x+y)=ax+ay | B.x2-4x+4=x(x-4)+4 |
C.10x2-5x=5x(2x-1) | D.x2-16+6x=(x+4)(x-4)+6x |
A.x(x-1)=x2-1 | B.x2-x=x(x+1) |
C.x2+x=x(x+1) | D.x2-x=x(x+1)(x-1) |
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