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The equation 2x2 + 5x - 12 = 0 is factored. Each factor is set equal to zero. What are these two equations?
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The equation 2x2 + 5x - 12 = 0 is factored. Each factor is set equal to zero. What are these two equations?

User Stephen Fischer
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2 votes
Hi,

2x^2+5x-12=0\\ \Rightarrow\ 2x^2+8x-3x-12=0\\ \Rightarrow\ 2x(x+4)-3(x+4)=0\\ \Rightarrow\ (x+4)(2x-3)=0\\ \Rightarrow\ x+4=0\ or\ 2x-3=0\\ \Rightarrow\ x=-4 \ or\ x= (3)/(2) \\ Sol=\{-4, (3)/(2)\}

User Cristiano Ghersi
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5.2k points
5 votes
(2x-3)·(x+4)
1. 2x-3=0 x=3/22. x+4=0x=-4

User Dernasherbrezon
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5.7k points
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