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Given that a = 3 and b = 7 , What is the value of 2a + b ?

This is a case of substitution. 2(3)+(7) =13

Answered by Shayna B. • Maths tutor

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factorise the quadratic: v^2+20v+19

Solve by factorisation. 3x^2 + 11x – 20 = 0

How to I factorise a quadratic equation?

Solve simultaneously: 3x+2y=7 & x-2y=-3

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