Question

factorise: x^3+3x^2-13x-15 help please

Answer 1

Answer:

See this.

Step-by-step explanation:

Hope it helps you...Please mark this answer as the brainliest and follow me.

Answer 2

Answer:

(x+5) (x-3) (x+1)

Step-by-step explanation:

$\sf \: {x}^{2} + {3x}^{2} - 13x - 15$

$\sf \implies \: (x + 5) \: ( {x}^{2} - 2x - 3)$

$\sf \implies \: (x + 5)[ {x}^{2} - 3x + x - 3 )]$

$\sf \implies \: (x + 5) [ {x}(x - 3) + 1(x - 3) ]$

$\sf \implies \: [(x+5)(x - 3)(x + 1) ]$

$\sf \implies(x + 5)(x - 3)(x + 1)$

What you need to know ?

• Polynomial is a variable basex dialect in the branch of mathematics.

• The factorisation of a polynomial can be done by GCF method (greatest common factor)

• A distributive law can be used to factorise few bionomials.

• We can also factor a monomial by wtiting it as product of other monomials.