Question

maths (r+6) (r-5)= ​

Answer 1

To evaluate:

(r+6)(r-5) = ???

Identity to be used:

• (a+b)(a-c) = a²+(b-c)a-bc

Solution:

(r+6)(r-5)

= r²+(6-5)r+(-5×6)

= r²+r-30