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Wat is 7x² + 4x - 5= 0
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Wat is 7x² + 4x - 5= 0

User Gavin Towey
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7x^2+4x-5=0\\ \Delta=4^2-4\cdot7\cdot(-5)=16+140=156\\ √(\Delta)=√(156)=2√(39)\\ x=(-4\pm2√(39))/(2\cdot7)=(-2\pm√(39))/(7)
User Ntimes
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Answer and workings in the attachment below.
Wat is 7x² + 4x - 5= 0-example-1
Wat is 7x² + 4x - 5= 0-example-2
User Kibar
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