wykonaj działania :
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Wyłącz wspólny czynnik przed nawias :
a)
4x²-21+6x+5=4x²+6x-16
b)
8x(1-x²)-(x-7)(-3x²)=8x-8x³-(-3x³+21x²)=8x-8x³+3x³-21x²=-5x³-21x²+8x
f)
1-4(x²-x+2)(1+x²)=1-4(x²+x⁴-x-x³+2+2x²)=1-4x²-4x⁴+4x+4x³-8-8x²=-4x⁴+4x³-12x²+4x-7
2bx(x²-2x+1)
(a+b)(x-1)
c)
(5-b)x²+7(5-b)x+(5-b)=(5-b)(x²+7x+1)
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a)
4x²-21+6x+5=4x²+6x-16
b)
8x(1-x²)-(x-7)(-3x²)=8x-8x³-(-3x³+21x²)=8x-8x³+3x³-21x²=-5x³-21x²+8x
f)
1-4(x²-x+2)(1+x²)=1-4(x²+x⁴-x-x³+2+2x²)=1-4x²-4x⁴+4x+4x³-8-8x²=-4x⁴+4x³-12x²+4x-7
a)
2bx(x²-2x+1)
b)
(a+b)(x-1)
c)
(5-b)x²+7(5-b)x+(5-b)=(5-b)(x²+7x+1)