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Whitepunk [10]
3 years ago
9

Simplify 21-(x+7) how do i solve it.

Mathematics
1 answer:
kari74 [83]3 years ago
6 0
21 - (x + 7) We would multiple the numbers inside the parenthesis with -

21 - x - 7 Then we simplify

14 - x

Or if it’s equal to 0 and you need to isolate the x then it’s

x = -14

Award me brainliest please if this helped
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Solve the equation by completing the square.
lyudmila [28]

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\boxed{ {x}^{2}   - 14x - 46 = 0}

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x1.2 =  \frac{ - 14  ± \sqrt{ { - 14}^{2} - 4(1 \times 46) } }{2 (1)}

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\boxed{ \bold{ - 7 ± 2 \sqrt{3}}}

8 0
2 years ago
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