Question

ii) Find the product using appropriate identities (x+3)(x-4)​

Answer 1

(x+3)(x-4)

(x+a)(x+b)=x^2 +(a+b)x+ab

=x^2+(3+-4)x+3×-4

=x^2+(-1)x+(-12)

=x^2-x-12

Answer 2

Answer:

(x+3)(x-4)

x^2+(3-4)x+(3)(-4)

x^2-1x-12