MCQ PracticeIf ab = 21 and frac(a + b)^2(a - b)^2 = (25)/(4), then the value of a 2 + b 2 + 3ab is?Subject: MathematicsTopic: AlgebraA115B121C125D127Correct Answer: BPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the