Question

if x(2×-3)=2×(×-4)+10,then×=​

Answer 1

Step-by-step explanation:

I

Given, X={1,2,3,....,10}

and A={1,2,3,4,5}

Now, A−B={4}

⇒B=A−{4}={1,2,3,4,5}−{4}

={1,2,3,5}

∴X−{4}−B

={1,2,3,...,10}−{4}−{1,2,3,5}

={6,7,8,9,10}

Therefore,number of subsets B of X i.e., {6,7,8,9,10} =2

5

.

Answer 2

Answer:

$x( 2x - 3) = 2x(x - 4) + 10$

$2 {x}^{2} - 3x = 2 {x}^{2} - 8x + 10$

$5x = 10$

$x = 2$

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