Q: How do you factorise 3x plus 15?

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the answer is x(3+y)

It is: 3(x+2)

(x + 2)(x + 1)

(x-1)(2x+5)

Factorise it: (x + 5)(3x - 8)

6x^3 + 3x = 3x(2x^2 + 1)

x2 + 2x - 15 = x2 - 3x + 5x - 15 = x(x - 3) + 5(x - 3) = (x + 5)(x - 3)

6x^2 + 5x + 1 = (3x +1) (2x + 1)

12x2 - 7x + 1 = 12x2 - 4x - 3x + 1 = 4x(3x - 1) - 1(3x - 1) = (3x - 1)(4x - 1)

(x+5)(x+3)

6x + 9x^3 = 3x*(2 + 3x^2)

It is 3(2y+5) when factorised