Simplify and then solve by factorisation 3x(x+2)-7=2, to find x.
3x(x+2)-7=2 3x2+6x-7=2 3x2+6x-9=0 3(x2+2x-3)=0 [Divide by 3] (x2+2x-3)=0 (x+3)(x-1)=0 x= -3 x=1
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Related Maths GCSE answers
All answers ▸A rectangular path has perimeter of 240m. If the rectangle is split lengthways, two paths of 160m are formed. Work out the lengths of the sides of the original path.
Simultaneous equation: (x-3y)=9,(2x+3y)=0
What does it mean to "complete the square"?
Solve, by method of substitution, the simultaneous equations: 5x+y=22 2x+y=10