exam Maths Puzzle Numerical Ability

3x + y = 5
4x - 7y = -10

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exam Other Question

how do you solve? 5x to the power of 5 + 10 to the power of 2 - 8x 1) Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:
a) Solve by factoring.
b) Solve by completing the square.
c) Solve by using the quadratic formula.