已知A=2x-13x²+3,B=5x²+4x-1,求A+B
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已知A=2x-13x²+3,B=5x²+4x-1,求A+B
已知A=2x-13x²+3,B=5x²+4x-1,求A+B
已知A=2x-13x²+3,B=5x²+4x-1,求A+B
A+B
=(2x-13x²+3)+(5x²+4x-1)
=-8x²+6x+2
不懂得欢迎追问.
A+B=(2x-13x²+3)+(5x²+4x-1)
=2x-13x²+3+5x²+4x-1
=-8x²+6x+2
A+B
=2x-13x²+3+5x²+4x-1
=-8x²+6x+2
A+B
=2x-13x²+3+5x²+4x-1
=(-13+5)x²+(2+4)x+3-1
= - 8x²+6x+2
= -2(4x²-3-1)
= - 2(x-1)(4x+1)