Question

Factorise:a^2-(b-3)a-3b

Answer 1

Answer:

${a}^{2} - (b - 3)a - 3b \\ {a}^{2} - ba + 3a - 3b \\ {a}^{2} + 3a - ba - 3b \\ a(a + 3) - b(a + 3) \\ (a + 3)(a - b)$

♠ Hope this may help you ♠

Answer 2

Answer:

Sorry to say, but the question seems incorrect. But let me tell you that it is a one step answer. Just use these formulas:

$\large {(x + a)(x + b) = {x}^{2} + (x + b)a + ab}$

$\large {(x - a)(x - b) = {x}^{2} - (x + b)a - ab}$

$\large {(x + a)(x - b) = {x}^{2} + (x - b)a - ab}$

$\large {(x - a)(x + b) = {x}^{2} - (x - b)a + ab}$

Any one of these formulas according to the type of the placement of the signs in the question, would help you factorise it.

Hope this helps...