Question

Choose the correct factors of the following expression: *

3x²+14x+15



A (3x+5)(x+3)

B (x+3)(x+5)

C (3+5x)(x+3)

D (3x+5)(3x+3)

​

Answer 1

Answer:

$3x {}^{2} + 14x + 15 \\ = 3x {}^{2} + 9x + 5x + 15 \\ = (3x {}^{2} + 9x) + (5x + 15) \\ = 3x(x + 3) + 5(x + 3) \\ = (3x + 5)(x + 3)$

So,

option a) (3x +5)(x + 3) is correct answer.

Answer 2

Answer:

option (a)

Step-by-step explanation:

expand the bracket according to options

or u can solve by determinator method

-b+-✓b²-4ac

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2a