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marissa [1.9K]
3 years ago
7

3x square + 4 x minus 15 is equals to zero ​

Mathematics
2 answers:
Anastasy [175]3 years ago
8 0

Answer:

x = -3             <u><em>OR</em></u>         x = 5/3

Step-by-step explanation:

=> 3x^2+4x-15 = 0

Using mid term break formula

=> 3x^2+9x-5x-15 = 0

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

Taking x-3 common

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

Either

x+3 = 0         <u><em>OR</em></u>       3x-5 = 0

x = -3             <u><em>OR</em></u>         x = 5/3

lisov135 [29]3 years ago
7 0

Answer:

<em>x = 5/3 </em>or<em> x = -3</em>

Step-by-step explanation:

3x² + 4x - 15 = 0

Factor left side.

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

Set factors equal to 0.

3x - 5 = 0

3x = 5

x = 5/3

x + 3 = 0

x = -3

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