Factorise: 5(3x+y)whole square +6(3x+y)-8

Asked by Virender | 31st May, 2016, 06:21: PM

Expert Answer:

Let space 3 straight x space plus space straight y space equals space straight a
So comma space the space polynomial space becomes space
5 straight a squared plus space 6 straight a space minus space 8
equals space 5 straight a squared plus space 10 straight a space minus space 4 straight a space minus space 8
equals 5 straight a space left parenthesis straight a space plus space 2 right parenthesis space minus space 4 space left parenthesis straight a space plus space 2 right parenthesis
equals left parenthesis straight a space plus space 2 right parenthesis space left parenthesis 5 straight a space minus space 4 right parenthesis space
equals left parenthesis 3 straight x space plus space straight y space plus space 2 right parenthesis space left square bracket 5 space left parenthesis 3 straight x space plus space straight y right parenthesis space minus space 4 right square bracket space
equals left parenthesis 3 straight x space plus space straight y space plus space 2 right parenthesis space left parenthesis 15 straight x space plus space 5 straight y space minus space 4 right parenthesis

Answered by Rebecca Fernandes | 1st Jun, 2016, 10:12: AM