exam Maths Puzzle Numerical Ability

hi,
i need some help with this problem please. solve the quadratic equation x^2+5x-6=0. thank you so much!!

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exam Other Question

Given: 5x+4<14
Prove: x<2
How do I find the slope and y-intercept of the line represented by each of the following equation?

2x - 3y = 6