原式=9-16y²+9+24y+16y²-6-8y
=16y+12
=-8+12
=4
求(3-4y)(3+4y)+(3+4y)^2-2(3+4y)的值,其中y=﹣1/2
求(3-4y)(3+4y)+(3+4y)^2-2(3+4y)的值,其中y=﹣1/2
數(shù)學(xué)人氣:822 ℃時(shí)間:2020-10-01 23:45:10
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