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Quadratic Formula

Solve for x...

Question

Solve for $x$ in $(x + 2) (x + 4) (x + 6) (x + 8) = 105$ .

A

- 1

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B

0

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C

1

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D

2

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Solution

The correct option is A $- 1$
Factorise 105 & analyse the pattern i.e.
105 = 1×3×5×7 = (x+2)(x+4)(x+6)(x+8)
Therefore comparing each term we get x = -1

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