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Consider this expression.
X^2 + x - 72
Replace the values of a and b to rewrite the given expression.

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

State one method by which you can recognize a perfect square trinomial.