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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solve: 4x^2 + 6x - 4 > 0


Solve 3(x-2)=21


Differentiate the following: 2x^2 + 3x -2


Factorise x^2 -7x+10, and hence solve x^2-7x+10=0


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