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yulyashka [42]
4 years ago
6

Solve seven x square 2 plus twenty x negative three equals? 7x2+20x-3=

Mathematics
1 answer:
Vinil7 [7]4 years ago
8 0
7x² + 20x - 3 = 0
x = <u>-(20) +/- √((20)² - 4(7)(-3))</u>
                       2(7)
x = <u>-20 +/- √(400 + 84)</u>
                   14
x = <u>-20 +/- √(484)
</u>               14<u>
</u>x = <u>-20 +/- 22
</u>             14<u>
</u>x = <u>-20 + 22</u>      x = <u>-20 - 22
</u>           14                     14<u>
</u>x = <u>2</u>                  x = <u>-42
</u>     14<u />                        14
x = ¹/₇                x = -3<u />
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