pls pls pls help n solve this expression
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(x-3) (x^2 - 3x + 5) - (x-2) (4x^2 + 5x - 4)
= x(x^2 - 3x + 5) - 3(x^2 - 3x + 5) - {x(4x^2 + 5x - 4) - 2(4x^2 + 5x - 4)}
= x^3 - 3x^2 + 5x - 3x^2 + 9x - 15 - {x(4x^2 + 5x - 4) - 2(4x^2 + 5x - 4)}
= x^3 - 6x^2 + 14x - 15 - {4x^3 + 5x^2 - 4x - 8x^2 - 10x + 8}
= x^3 - 6x^2 + 14x - 15 - { 4x^3 - 3x^2 - 14x + 8}
= x^3 - 6x^2 + 14x - 15 - 4x^3 + 3x^2 + 14x - 8
= - 3x^3 - 3x^2 + 28x - 23.
Hope it's helpful to u.
= x(x^2 - 3x + 5) - 3(x^2 - 3x + 5) - {x(4x^2 + 5x - 4) - 2(4x^2 + 5x - 4)}
= x^3 - 3x^2 + 5x - 3x^2 + 9x - 15 - {x(4x^2 + 5x - 4) - 2(4x^2 + 5x - 4)}
= x^3 - 6x^2 + 14x - 15 - {4x^3 + 5x^2 - 4x - 8x^2 - 10x + 8}
= x^3 - 6x^2 + 14x - 15 - { 4x^3 - 3x^2 - 14x + 8}
= x^3 - 6x^2 + 14x - 15 - 4x^3 + 3x^2 + 14x - 8
= - 3x^3 - 3x^2 + 28x - 23.
Hope it's helpful to u.
Dharanikalaiselvan:
yes
I think it should be 28x not 27x.
In 4th step you have written 13x. It should be 14x.
Yaa. Thnx
Its okk
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