Help me out plzzzzzz

Mathematics

2 answers:

Komok [63]2 years ago

7 0

Answer:

......................

Minchanka [31]2 years ago

4 0

Answer:

A=4, B=3, C=2, D=7 or A=2, B=7, C=4, D=3

Step-by-step explanation:

To factor this, you are looking for factors of 8×21 = 168 that have a sum of 34.

168 = 1×168 = 2×84 = 3×56 = 4×42 = 6×28 = 7×24 = 8×21 = 12×14

The sums of these factor pairs are 169, 86, 59, 46, 34, 31, 29, 26. The factor pair whose sum is 34 is 6×28. This means we can rewrite the expression as ...

8x² +28x +6x +21

Factoring by pairs gives ...

4x(2x +7) +3(2x +7)

(4x +3)(2x +7) ⇒ A=4, B=3, C=2, D=7 or A=2, B=7, C=4, D=3

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