Factorise the following:
x2 - 3x + 2 b) a2 + 19a - 20
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x^2 - 3x + 2 = 0
x^2 -2x -x + 2= 0
x(x-2) - 1(x-2) = 0
(x-1)(x-2) = 0
x = 1 , 2
a^2 +19a - 20 = 0
a^2 + 20a - a - 20 = 0
a(a+20) - 1(a+20) = 0
(a-1)(a+20) = 0
a = 1 , -20
as26125:
we have to factorise this
That's what i have done
this is not Question which u have doneb
u have find the value of x
Answered by
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x2-3x+2
x2-2x-x+2
x(x-2)-1(x-2)
(x-2)(x-1)
a2+19a-20
a2+20a-a-20
a(a+20)-1(a+20]
(a-1)(a+20)
thanks
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