SOLUTION: Consider the following formula: y = 3 ( x + 5 ) ( x - 2 ) Which of the following formulas is equivalent to this one? A. y=3x2+9x-30 B. y=x2+3x-lO C. y=3x2+3x-lO D. y=

Algebra ->  Functions -> SOLUTION: Consider the following formula: y = 3 ( x + 5 ) ( x - 2 ) Which of the following formulas is equivalent to this one? A. y=3x2+9x-30 B. y=x2+3x-lO C. y=3x2+3x-lO D. y=      Log On


   

Question 433143: Consider the following formula: y = 3 ( x + 5 ) ( x - 2 )
Which of the following formulas is equivalent to this one?

A. y=3x2+9x-30
B. y=x2+3x-lO
C. y=3x2+3x-lO
D. y=3x2+3x-30
And why??? how is this solved?
Found 2 solutions by ewatrrr, pheonix1974:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

 y = 3( x + 5 )( x - 2 ) = 3(x^2+3x-10) = 3x^2 + 9x-30 

F	First terms

O	Outside terms

I	Inside terms

L	Last terms

Answer by pheonix1974(2) About Me  (Show Source):
You can put this solution on YOUR website!
You begin by foiling this out
3 (x+5) (x-2)
3* (x^2 -2x +5x -10)
3* (x^2 +3x -10)
3x^2 +9x -30
The answer is A