-4x²+(2x-3y)²运用平方差公式分解因式①-4x²+(2x-3y)²②16(a+b)²-9(a-b)²③9m²(a-b)^3+49(b-a)^3④(x+y-z)²-(x-y+z)²⑤(a²-b²)+(3a+3b)⑥x^4-1

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-4x²+(2x-3y)²运用平方差公式分解因式①-4x²+(2x-3y)²②16(a+b)²-9(a-b)²③9m²(a-b)^

-4x²+(2x-3y)²运用平方差公式分解因式①-4x²+(2x-3y)²②16(a+b)²-9(a-b)²③9m²(a-b)^3+49(b-a)^3④(x+y-z)²-(x-y+z)²⑤(a²-b²)+(3a+3b)⑥x^4-1
-4x²+(2x-3y)²运用平方差公式分解因式
①-4x²+(2x-3y)²
②16(a+b)²-9(a-b)²
③9m²(a-b)^3+49(b-a)^3
④(x+y-z)²-(x-y+z)²
⑤(a²-b²)+(3a+3b)
⑥x^4-1

-4x²+(2x-3y)²运用平方差公式分解因式①-4x²+(2x-3y)²②16(a+b)²-9(a-b)²③9m²(a-b)^3+49(b-a)^3④(x+y-z)²-(x-y+z)²⑤(a²-b²)+(3a+3b)⑥x^4-1

-4x²+(2x-3y)²
=(2x-3y)²-(2x)²
=(2x-3y-2x)(2x-3y+2x)
=-3y(4x-3y)
16(a+b)²-9(a-b)²
=[4(a+b)]²-[3(a-b)]²
=[4(a+b)-3(a-b)][4(a+b)+3(a-b)]
=(a+7b)(7a+b)
9m²(a-b)³+49(b-a)³
=9m²(a-b)³-49(a-b)³
=(a-b)³[(3m)²-7²]
=(a-b)³(3m-7)(3m+7)
(x+y-z)²-(x-y+z)²
=[(x+y-z)-(x-y+z)][(x+y-z)+(x-y+z)]
=(2y-2z)(2x)
=4x(y-z)
(a²-b²)+(3a+3b)
=(a-b)(a+b)+3(a+b)
=(a+b)(a-b+3)
x^4-1
=(x²)²-1²
=(x²-1)(x²+1)
=(x-1)(x+1)(x²+1)

①-4x²+(2x-3y)²
=(2x-3y)²-4x²
=(2x-3y+2x)(2x-3y-2x)
=-3y(4x-3y)
②16(a+b)²-9(a-b)²
=(4a+4b+3a-3b)(4a+4b-3a+3b)
=(7a+b)(a+7b)
③9m²(a-b)^3+49...

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①-4x²+(2x-3y)²
=(2x-3y)²-4x²
=(2x-3y+2x)(2x-3y-2x)
=-3y(4x-3y)
②16(a+b)²-9(a-b)²
=(4a+4b+3a-3b)(4a+4b-3a+3b)
=(7a+b)(a+7b)
③9m²(a-b)^3+49(b-a)^3
=9m²(a-b)³-49(a-b)³
=(a-b)³(9m²-49)
=(a-b)³(3m+7)(3m-7)
④(x+y-z)²-(x-y+z)²
=(x+y-z+x-y+z)(x+y-z-x+y-z)
=2x(2y-2z)
=4x(y-z)
⑤(a²-b²)+(3a+3b)
=(a+b)(a-b)+3(a+b)
=(a+b)(a-b+3)
⑥x^4-1
=(x²+1)(x²-1)
=(x²+1)(x+1)(x-1)

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①-4x²+(2x-3y)²=(2x-3y+2x)(2x-3y-2x)=-3y(4x-3y)
②16(a+b)²-9(a-b)²=(4a+4b+3a-3b)(4a+4b-3a+3b)=(7a+b)(a+7b)
③9m²(a-b)^3+49(b-a)^3=(a-b)^3*(3m+7)(3m-7)
④(x+y-z)²-...

全部展开

①-4x²+(2x-3y)²=(2x-3y+2x)(2x-3y-2x)=-3y(4x-3y)
②16(a+b)²-9(a-b)²=(4a+4b+3a-3b)(4a+4b-3a+3b)=(7a+b)(a+7b)
③9m²(a-b)^3+49(b-a)^3=(a-b)^3*(3m+7)(3m-7)
④(x+y-z)²-(x-y+z)^2=(x+y-z+x-y+z)(x+y-z-x+y-z)=(2x)(2y)=4xy
⑤(a²-b²)+(3a+3b)=(a+b)(a-b)+3(a+b)=(a+b)(a-b+3)
⑥x^4-1=(x^2+1)(x^2-1)=(x^2+1)(x+1)(x-1)

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