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12 votes
12 votes
High School

Please please help please please help me please please help please please help me please please help please please help me please please help please please help me please please help please please help me please please help please please help me please please help please please help me please please AND SHOW YOUR WORK

High School Please please help please please help me please please help please please-example-1
High School Please please help please please help me please please help please please-example-1
High School Please please help please please help me please please help please please-example-2
User Delance
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1 Answer

17 votes
17 votes

Answer:

Explanation:

6) y = 2x² + 6x - 80

1) y = 2*x² + 2*3x - 2*40

y = 2 [ x² + 3x - 40]

2) Sum = 3

Product = -40

Factors = (-5) ; 8 {-5 +8 = 3 ; (-5)*8 = -40}

y = 2 [ x² + 8x - 5x - 40]

= 2 [ x(x + 8) - 5(x + 8) ]

= 2 [ (x +8) (x - 5)]

y = 2(x +8)(x -5)

b) y = 0

2(x + 8)(X - 5) = 0

x + 8 = 0 ; x - 5 = 0

x = -8 ; x = 5

(-8) ; 5 are the zeros.

User Khodor
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