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Komok [63]
3 years ago
11

I don’t know how to solve the equation

Mathematics
1 answer:
Artemon [7]3 years ago
8 0
To solve this equation we have to factor.
We are looking for 2 numbers with a sum of -3, and multiplied they have to be -28. These numbers are -7 and 4.

So:
{x}^{2}  - 3x - 28 = 0
(x - 7)(x + 4) = 0
x - 7 = 0 \:  \:  \:  \: x + 4 = 0
x = 7 \:  \:  \:  \: x =  - 4

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