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Example 3.20Expand the following:(ii) (3x - 1)(3(i) (x+5)(x + 6)(x + 4) |
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Answer» (x+5)(x+6)=(x^2+6x+5x+30)= ( x^2+11x+30)(x+4)= =(x^3+11x^2+30x+4x^2+44x+120)=( x^3+15x^2+74x+120) |
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