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LuckyWell [14K]
3 years ago
14

absmiddle" class="latex-formula">
Mathematics
1 answer:
Svetlanka [38]3 years ago
6 0

Answer:

x = 4 \\ x =  - 8

Step-by-step explanation:

x^{2}+4x-40=-8 \\  {x}^{2}  + 4x = 40 - 8 \\  {x}^{2}  + 4x = 32 \\  {x}^{2}  + 4x - 32 = 0 \\ {x}^{2}  + 8x - 4x - 32 = 0 \\ x(x + 8) - 4(x + 8) = 0 \\( x - 4)(x + 8) = 0 \\ x - 4 \:  \:  \:  \:  \:  \: or \:  \:  \:  \:  \: x + 8 = 0 \\ x = 4 \:  \:  \:  \: or \:  \:  \:  \: x =  - 8

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