18(a)Quadratic Equations InequalitiesMedium3 marksThe diagram shows a rectangle. The shaded area is 30cm2.Show that x2+16x−36=0.AnswerTypeWriteMath0 wordsGrade answerSolutionGrading criteria
18(b)Quadratic Equations InequalitiesMedium3 marksSolve by factorisation x2+16x−36=0 to find the length x cm.Factorised formx=cmGrade answerSolutionGrading criteria