Write the quadratic function f(x) = x2 + 8x + 3 in vertex form.
a) f(x) = (x - 4)2 - 13
b) f(x) = (x - 4)2 + 3
c) f(x) = (x + 4)2 + 3
d) f(x) = (x + 4)2 - 13

D) f(x)=(x+4)2-13

Step-by-step explanation:

The vertex has an x-coordinate at x = -4 and y-coordinate at f(-4) = -13. The answer is f(x) = (x + 4)2 - 13.

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.