Answer:
x^2 + 11 x + 28
Step-by-step explanation:
Expand the following:
(x + 4) (x + 7)
(x + 4) (x + 7) = (x) (x) + (x) (7) + (4) (x) + (4) (7):
x x + 7 x + 4 x + 4 7
x x = x^2:
x^2 + 7 x + 4 x + 4 7
4×7 = 28:
x^2 + 7 x + 4 x + 28
7 x + 4 x = 11 x:
Answer: x^2 + 11 x + 28
Multiply each term in each set of parentheses by each one:
X * x = x^2
X * 4 = 4x
7 * x = 7x
7 * 4 = 28
Combine to get x^2 + 11x + 28
