Answer:
4x^2 + 27x - 7
Step-by-step explanation:
Multiply out (4x - 1)(x + 7);
f(x) = 4x^2 + 28x - x - 7, or 4x^2 + 27x - 7
Answer:
y = 4x² + 27x - 7
Step-by-step explanation:
y = (4x - 1)(x + 7)
Opening the brackets:
y = 4x² + 28x - x -7
y = 4x² +27x - 7
