exam Maths Puzzle Numerical Ability

Apply using quadratic formula to find the roots and graph.
g(x)= x^2 - x - 12

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exam Other Question

-147856987456 + (45xn)= n + 45 x 1 1/2 Could you please help me with solving this system of equation using multiplication? I get how to solve problems with addition anbd subtraction just not multiplication. Thanks
x+3y=-2
2x+y=6