Solve these 2 equations simultaneously: 7x+y=1 and 2x squared - y=3
7x+y=1 (1) -> y= 2x2 - 3 (3)
7x + 2x2 -3-1=0 -> (2x-1)(x+4)=0 so 2x-1=0 so 2x=1 so x=0.5 and x+4=0 so x=-4
7(0.5)+y=1 so y=1-3.5 so y=-2.5 and 7(-4) +y=1 so -28+y=1 so y= 29
Full answer:
x=0.5 y=-2.5 and x=-4 y=29
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