Question

Factorise x^2-11x+30=0

Answer 1

Answer:

x=−6

or

x=−5

Explanation:

We need to factorise first.

Find factors of 30 which add up to 11. The signs in the brackets will be the same, both positive.

5×6=30,

and

5+6=11

#(x+5)(x+6) = 0

We are multiplying two factors and getting the answer 0, Therefore one of the factors must be 0.

if

x+5=0

,

x=−5

if

x+6=0

,

x=−6

follow me !

Answer 2

Answer:

x^2-6x-5x+30=0

x(x-6)-5(x-6)=0

(x-6)(x-5)=0

x-6=0 , x-5=0

x=6 , x=5

Step-by-step explanation:

so answer is x=5and 6