Quadratic Factorisation

Factorise:

$x^2+5x-50$

• $\left(x+25\right)\left(x-2\right)$

• $\left(x-5\right)\left(x+10\right)$

• $\left(x-10\right)\left(x+5\right)$

• $\left(x-25\right)\left(x+2\right)$

Factorise:

 $x^2-x-12$  

•  $\left(x+3\right)\left(x+4\right)$  

•  $\left(x-4\right)\left(x-3\right)$  

•  $\left(x-3\right)\left(x+4\right)$  

•  $\left(x-4\right)\left(x+3\right)$  

Which of these (more than one) are types of factorisation?

• Common Factor

• Quadratic

• Using Brackets

• Difference of Squares

• Expansion

Factorise:

 $x^2-8x-33$  

•  $\left(x-3\right)\left(x+11\right)$  

•  $\left(x+33\right)\left(x-1\right)$  

•  $\left(x+3\right)\left(x-11\right)$  

•  $\left(x-33\right)\left(x+1\right)$  

When factorising a trinomial that looks like this:

 $x^2-ax+b$  
The signs in the brackets should both be (a)   .

Factorise:

 $x^2-9x-10$  

•  $\left(x-9\right)\left(x+1\right)$  

•  $\left(x+1\right)\left(x-10\right)$  

•  $\left(x+9\right)\left(x-1\right)$  

•  $\left(x-10\right)\left(x-1\right)$  

Factorise:

 $x^2+3x-130$  

•  $\left(x+18\right)\left(x-15\right)$  

•  $\left(x-18\right)\left(x+15\right)$  

•  $\left(x-13\right)\left(x+10\right)$  

•  $\left(x+13\right)\left(x-10\right)$  

What type of factorisation would you use to factorise this:

 $x^2-25$  

• Common Factor

• Difference of Squares

• Quadratic Factorisation

• It doesn't factorise

Tags

CCSS.HSA.APR.C.4

What type of factorisation would you use to factorise this:

 $x^2+3x-10$  

• Common Factor

• Difference of Squares

• Quadratic

• This doesn't factorise

What type of factorisation would you use to factorise this:

 $x^2+6x+11$  

• Common Factor

• Difference of Squares

• Quadratic

• This doesn't factorise