Tick ( ) the correct answer: x^2 + 6x + 8 = ? - Vidyadip

MCQ

Tick $(\checkmark)$ the correct answer:
$x^2 + 6x + 8 = ?$

A
$(x + 3)(x + 5)$
B
$(x + 3)(x + 4)$
✓
$(x + 2)(x + 4)$
D
$(x + 1)(x + 8)$

✓

Answer

Correct option: C.

$(x + 2)(x + 4)$

C. $(x + 2)(x + 4)$
Solution:
$x^2 + 6x + 8$
$= x^2+ 4x + 2x + 8$
${8 = 4 × 2, 6 = 4 + 2}$
$= x(x + 4) + 2(x + 4)$
$= (x + 2)(x + 4)$

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