3)calcule os produtos:
a)(x+3)x(x+4) d)(2x-5)x(3x-2)
b)(a-2)x(a-7) e)(1-2x)x(4+3x)
c)(y-6)x(y+6) f)(-x+4)x(x+5)
4)Efetue:
a)(8x^4-6x^3+4x^2-2x+10):2
b)(20a^3-15a^2+30a):5
c)(16x^3-4x^2+8x):(-4x)
a)(x+3)x(x+4) d)(2x-5)x(3x-2)
b)(a-2)x(a-7) e)(1-2x)x(4+3x)
c)(y-6)x(y+6) f)(-x+4)x(x+5)
4)Efetue:
a)(8x^4-6x^3+4x^2-2x+10):2
b)(20a^3-15a^2+30a):5
c)(16x^3-4x^2+8x):(-4x)
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3)calcule os produtos:
a)(x+3)x(x+4) = x2 + 4x + 3x + 12==> x2 + 7x + 12
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b)(a-2)x(a-7) = a2 - 7a - 2a + 14 ==> a2 - 9a + 14
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c)(y-6)x(y+6) = y2 - 36
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d)(2x-5)x(3x-2) = 6x2 - 4x - 15x + 10 ==> 6x2 - 19x + 10
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e)(1-2x)x(4+3x) = 4 + 3x - 8x -6x2 ==> 4 - 5x - 6x2
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f)(-x+4)x(x+5) = - x2 - 5x + 4x + 20==> - x2 - x + 20