Question

3x square + 14x + 15​

Answer 1

Answer:

3x²+14x+15

by factorisation method

3x²+9x+5x+15=0

3x(x+3)+5(x+3)=0

(3x+5)(x+3)=0

either 3x+5=0 or x+3=0

3x=-5. , x=-3

x=-5/3

these are the values of x

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Answer 2

$3{x}^{2}+14x+15\\3{x}^{2}+9x+5x+15=0\\3x(x+3)+5(x+3)=0\\(3x+5)+(x+3)=0\\3x + 5 = 0 \: or \: x + 3 = 0 \\ 3x = - 5 \: or \: x = - 3 \\ x = \binom{ - 5}{3}$

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