Step-by-step explanation:
f(2)= -2×2×2+ 6×2 -7
=-8+12-7
=-3
Answer:
x²- y² = (x+y) (x-y)
x² + xy = x(x+y)
x² + 2xy + y² = (x+y) (x+y)
y=4/3x - 5