(x+3y)(2x-y);16-(2a+3b)²;﹣36x²+12xy-y²;4x(a-b)-8y(b-a);(x²-5)²+8(x²-5)+16
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(x+3y)(2x-y);16-(2a+3b)²;﹣36x²+12xy-y²;4x(a-b)-8y(b-a);(x²-5)²+8(x²-5)+16
(x+3y)(2x-y);16-(2a+3b)²;﹣36x²+12xy-y²;
4x(a-b)-8y(b-a);(x²-5)²+8(x²-5)+16
(x+3y)(2x-y);16-(2a+3b)²;﹣36x²+12xy-y²;4x(a-b)-8y(b-a);(x²-5)²+8(x²-5)+16
(x+3y)(2x-y)
=x(2x-y)+3y(2x-y)
=2x²-xy+6xy-3y²
=2x²+5xy-3y²
16-(2a+3b)²
=[4-(2a+3b)][4+(2a+3b)]
=(4-2a-3b)(4+2a+3b)
﹣36x²+12xy-y²
=﹣(36x²-12xy+y)²
=-(6x-y)²
4x(a-b)-8y(b-a);
=4x(a-b)+8y(a-b)
=4(a-b)(x+2y)
(x²-5)²+8(x²-5)+16
=(x²-5+4)²
=(x²-1)²
=[(x-1)(x+1)]²
=(x-1)²(x+1)²
(x+3y)(2x-y);
=x^2-xy+6xy-3y^2
=x^2+5xy-3y^2
16-(2a+3b)²;
=[4+(2a+3b)][4-(2a+3b)]
=(4+2a+3b)(4-2a-3b)
﹣36x²+12xy-y²;
=-(36x^2-12xy+y^2)
=-(6x-y)^2
4x...
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(x+3y)(2x-y);
=x^2-xy+6xy-3y^2
=x^2+5xy-3y^2
16-(2a+3b)²;
=[4+(2a+3b)][4-(2a+3b)]
=(4+2a+3b)(4-2a-3b)
﹣36x²+12xy-y²;
=-(36x^2-12xy+y^2)
=-(6x-y)^2
4x(a-b)-8y(b-a);
=4x(a-b)-[-8y(a-b)]
=4x(a-b)+8y(a-b)
=4(a-b)(x+2y)
(x²-5)²+8(x²-5)+16
=[(x^2-5)+4]^2
=(x^2-1)^2
=[(x++1)(x-1)]^2
=(x+1)^2(x-1)^2
收起
(x+3y)(2x-y);
=2x²+5xy-3y²
16-(2a+3b)²;
=(4-2a-3b)(4+2a+3b)
﹣36x²+12xy-y²;
=-(36x²-12xy+y²)
=-(6x-y)²
4x(a-b)-8y(b...
全部展开
(x+3y)(2x-y);
=2x²+5xy-3y²
16-(2a+3b)²;
=(4-2a-3b)(4+2a+3b)
﹣36x²+12xy-y²;
=-(36x²-12xy+y²)
=-(6x-y)²
4x(a-b)-8y(b-a);
=4x(a-b)+8y(a-b)
=4(a-b)(x+2y)
(
(x²-5)²+8(x²-5)+16
=(x²-5+4)²
=(x²-1)²
=(x-1)²(x+1)²
收起