Question

Simplify (x – 4)(x2 – 2x – 3) please! ;)

Answer 1

Hint:

(x – 4)(x^2 – 2x – 3)

expands out to

x(x^2 – 2x – 3) - 4(x^2 – 2x – 3)

Answer 2

then what?

Answer 3

then distribute

Answer 4

so....x3 + 6x2 – 11x + 12

Answer 5

x(x^2 – 2x – 3) - 4(x^2 – 2x – 3)

x*x^2 – x*2x – x*3 - 4*x^2 -4*(-2x) -4(-3) ... Distribute here

x^3 - 2x^2 - 3x - 4x^2 + 8x + 12 ... multiply

x^3 - 6x^2 + 5x + 12 ... combine like terms


So

x(x^2 – 2x – 3) - 4(x^2 – 2x – 3)

turns into

x^3 - 6x^2 + 5x + 12

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This means that

(x – 4)(x^2 – 2x – 3)

simplifies to

x^3 - 6x^2 + 5x + 12

Answer 6

So you were close