In each of the following, determine whether the given values are solutions of the given equation or not:

(i)


(ii)


(iii)


(iv)


(v)


(vi)


(vii)

We will have to check for each value and see whether it satisfies the equation.


(i)


For x = 2,


22 – 3 × 2 + 2 = 0


0 = 0


Thus, x = 2 is a solution.


For, x = 1


12 – 3 × 1 + 2 = 0


0 = 0


Thus, x = 1 is a solution.


(ii)


For x = 0,


0 + 0 + 1 = 0


1 = 0 which is not true thus x = 0 is not a solution


For x = 1,


1 + 1 + 1 = 0


3 = 0 which is not true thus x = 1 is not a solution


(iii)


For x= √3


3 – 3√3 × √3 + 6 = 0


3 – 9 + 6 = 0


0 = 0


Thus, x = √3 is a solution


For x = -2√3


(-2√3)2 – 3√3 × -2√3 + 6 = 0


4 × 3 + 18 + 6 = 0


36 = 0 which is not true, thus x = -2√3 is not a solution


(iv)


For x = 5/6




61 = 65 which is not true, thus x = 5/6 is not a solution


For x = 4/3



25/12 = 13/6


25 = 26 which is not true, thus x = 4/3 is not a solution


(v)


For x = 2,


2 × 4 – 2 + 9 = 4 + 4 × 2 + 3


15 = 15, thus x = 2 is a solution.


For x = 3


2 × 9 – 3 + 9 = 9 + 4 × 3 + 3


24 = 24, thus x = 3 is also a solution


(vi)


For x = -√2,


2 - √2 × -√2 – 4 = 0


2 + 2 – 4 = 0


0 = 0


Thus, x = -√2 is a solution


For x = -2√2


4 × 2 - √2 × -2√2 – 4 = 0


8 + 8 – 4 = 0


12 = 0 which is not true, thus x = -2√2 is not a solution


(vii)


For, x = a/b



a4/b2 – 3a2 + 2b2 = 0 which is not true, thus x = a/b is not a solution


For x = b/a



b2 – 3b2 + 2b2 = 0


0 = 0 , thus x = b/a is a solution


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