D1 NSM Ex 5A Q4

#MathSolutions,
#OxfordOlevel,
#OlevelMaths,
#Grade7Maths,
#Grade8Maths,
#MathsProblem,
#StudentsofMathematics,
#Mathmadeeasy,
#OlevelGuide,
#AlgerbaSolutions,
#Geometery,
#BasicMaths,
#Mathhelp,
#Trigonometery,
#QuadraticEquation,
#SquaresCubes,
#GcseMaths,
#IgcseMaths,
#Onlinemaths,
#Tution,
#D1Solutions,
#NSW,
#7thEdition,
#Mathclass,