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GalinKa [24]
3 years ago
8

Factor completely: 2a2 + a − 28

Mathematics
2 answers:
Marrrta [24]3 years ago
5 0

Answer:

A

Step-by-step explanation:

2a^2 + a -28

Recall: ax^2 + bx + c

a*c = 2*28= 56

sum of factors= +8-7 = 1

multiply of factor= 8*7=56

2a^2 +8a -7a-28

(2a^2 + 8a) - (7a - 28)

2a(a +4) - 7(a + 4)

Therefore

(2a-7)(a+4)

lisov135 [29]3 years ago
3 0

Answer:

A.   (2a - 7)(a + 4).

Step-by-step explanation:

2a2 + a − 28

= 2a^2 + 8a - 7a - 28

= 2a(a + 4) - 7(a + 4)

The a + 4 is common so we have:

(2a - 7)(a + 4).

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