1/5 + 3/10
= 2/10 + 3/10
= 5/10
= 1/2
Just remember that something outside the parentheses applies to everything inside.
Examples:
3 times (x + 2) . . . . . means . . . . . 3 times 'x' <u>plus</u> 3 times 2
a (b + c) . . . . . means . . . . . ab <u>plus</u> ac
4 (w + x + y + 2) . . . means . . . 4w + 4x + 4y + 8
When somebody gives you an equation that has parentheses in it,
the first thing you're always supposed to do is get rid of them.
With the examples I just gave you, you know how to do that now.
Answer:
B y = 3x^2 + 12x + 19
Step-by-step explanation:
y = 3(x + 2)^2 + 7
To expand the square of the binomial,
either recall that (a + b)^2 = a^2 + 2ab + b^2, or use FOIL.
y = 3(x^2 + 4x + 4) + 7
y = 3x^2 + 12x + 12 + 7
y = 3x^2 + 12x + 19
Answer: B y = 3x^2 + 12x + 19
