Expand and simplify the following expression: x(5x – 2) – 3(x2 – 2x + 7)

5x2 – 2x – 3x2 + 6x – 21= 2x2 + 4x − 21

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y=6x+9 , 3y-18x+9=0 Are these lines parallel?


Solve the following simultaneous equations: (1) 4x+y=7 and (2) 3x+2y=9


solve this equation x^2 -2x=-1


Explain how to solve simulatentous equations.


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