SOLUTION: 2. 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.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 2. 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.      Log On


   

Question 579389: 2. 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
How do I go about this?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
y = 3(x+5)(x-2)

y = 3(x*x + x*(-2) + 5x + 5(-2))

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

y = 3(x^2+3x-10)

y = 3x^2+9x-30


So the answer is choice A