exam Maths Puzzle Numerical Ability

hello,

how would you factor each polynomial:

a) x^2 - 100

b) 4y^2 - 49

thank you!

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exam Other Question

the denominator of a fraction is 5 more than the numerator. if 5 is added to the numerator and 2 is added to the denominator, the value of the fraction is 8/9. find the original fraction. The coordinates of point x are (6,2). If point x is one corner of a square, name 3 other corners.