FACTOR each problem as demonstrated in class.Show All WORK! 4. x^2+13x+36 5. x^2+7x-18

4. To factor the quadratic expression $x^{2}+13x+36$, we need to find two numbers whose product is 36 and whose sum is 13. The numbers 4 and 9 satisfy these conditions. Therefore, the factored form of the expression is $(x+4)(x+9)$.<br /><br />5. To factor the quadratic expression $x^{2}+7x-18$, we need to find two numbers whose product is -18 and whose sum is 7. The numbers 9 and -2 satisfy these conditions. Therefore, the factored form of the expression is $(x+9)(x-2)$.