If F(x)=2x^2-7x+3
then f(2)=2(2)^2-7(2)+3
= 8-14+3
= -3
and f(-3)=2(-3)^2-7(-3)+3
=18 + 21+3
= 42
You just have to plug in the number they are giving you, then do the equation. Always remember your order of operations. I remember it as Please Excuse My Dear Aunt Sally (which is PEMDAS) Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
then f(2)=2(2)^2-7(2)+3
= 8-14+3
= -3
and f(-3)=2(-3)^2-7(-3)+3
=18 + 21+3
= 42
You just have to plug in the number they are giving you, then do the equation. Always remember your order of operations. I remember it as Please Excuse My Dear Aunt Sally (which is PEMDAS) Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
