Question

Use the formula to multiply the following:
1. (a+9) (a-6)
2. (×/5+3) (×/5-2)

Answer 1

Answer:

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

1. (a+9)(a-6)= (a^2)+(9-6)a+(9)(-6)

=a^2 + 3a + 3

2. (x/5+3)(x/5-2)= (x/5^2)+(3-2)x/5+(3)(-2)

=x/5^2+3x/5-2x/5+1