Plz me get the answer to these asap

-2x² + 14x

Step-by-step explanation:

Use the distributive property: a(b + c) = ab + ac

-2x(x - 7) = (-2x)(x) + (-2x)(-7) = -2x² + 14x

F(x) = -4(x-6)^2 + 3  maximum value is found by solving the root of the first derivative. that root is where the maximum value is.  f ' (x) = -8(x - 6) = 0.  so x = 6 and that's the maximum value. f(6) = 3  2cos(2x - π) + 4 is a trig function. the maximum value of cosine function is 1.  so the maximum value would be 2(1) + 4 = 6.