Factorise x^2-25

=(x-5)(x+5)

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Given that y = 5, solve the following equation for x, 9x - 3y = 97 - 5x


Solve the equation "x^2 + 3x - 4 = 0".


Factorise this quadratic = 8x^2 + 2x -3


Solve 8x + 9y = 3 and x + y = 0.