exam Maths Puzzle Numerical Ability

Solve using the quadratic formula:
x2 – 7x – 1 = -7

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Please help me.i have a coursework to submitted in two day time.but i seem can't find the answer to the question below as i was very poor in algebra.and it was quiet urgent.can an The length of the field is 1/2 the length of the entire flag. There are seven shaded stripes and six unshaded stripes. Though the stripes differ in length, they are of equal widt