Answer:
x^2+4x-21
Step-by-step explanation:
hope it helps
Option D, x² + 4x - 21
Using FOIL;
x * x = x²
x * (-3) = -3x
7 * x = 7x
7 * (-3) = -21
Therefore; x² + (-3x) + 7x - 21
=> If simplified:
=> x² + 4x - 21
Hope this helps!
