1. 2,1a²b²c⁴*(-1³/₇)bc³d=(2¹/₁₀)a²b²c⁴*(-10/7)bc³d=
=(21/10)a²b²c⁴*(-10/7)bc³d=-3a²b³c⁷d.
2. V=4a²b⁵*2ab*3ab²=24a⁴b⁸.
3. Z-(3x²-2x)=5x²-6x Z=5x²-6x+3x²-2x=8x²-8x.
4.
a) 2x*(a-b)+a*(a-b)=(a-b)(2x+a).
b) 3x+3y-bx-by=3*(x+y)-b*(x+y)=(x+y)(3-b).
5. (4x-(3x-1))(3x-(2x+4))=(4x-3x+1)(3x-2x-4)=(x+1)(x-4).
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Answers & Comments
1. 2,1a²b²c⁴*(-1³/₇)bc³d=(2¹/₁₀)a²b²c⁴*(-10/7)bc³d=
=(21/10)a²b²c⁴*(-10/7)bc³d=-3a²b³c⁷d.
2. V=4a²b⁵*2ab*3ab²=24a⁴b⁸.
3. Z-(3x²-2x)=5x²-6x Z=5x²-6x+3x²-2x=8x²-8x.
4.
a) 2x*(a-b)+a*(a-b)=(a-b)(2x+a).
b) 3x+3y-bx-by=3*(x+y)-b*(x+y)=(x+y)(3-b).
5. (4x-(3x-1))(3x-(2x+4))=(4x-3x+1)(3x-2x-4)=(x+1)(x-4).