Question

Write the equation f(x)=3(x-7)^2+5 in standard form

A) f(x)=3x^2-42x+152
B) f(x)=3x^2-21x+5
C) f(x)=3x^2-42x-142

Answer 1

standard form
expand first then add


f(x)=3(x-7)²+5
f(x)=3(x-7)(x-7)+5
f(x)=3(x²-14x+49)+5
f(x)=3x²-42x+147+5
f(x)=3x²-42x+152

A is answer