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vipul

· started a discussion

· 1 Months ago

about 3rd step (Question: 237327.2 )

how does 4 come

Question:

DIRECTIONS: What will come in place of the question mark (?) in the following questions?

6 14    – 2 12    – 1 13    –  16    = (?)² – 112 × 53 ÷ 8 + 726 + 12

Options:
A)

3.5

B)

5.5

C)

2.5

D)

4.5

E)

1.5

Solution:

Ans: (c)6 14    – 2 12    – 1 13    –  16    = (?)² – 112 × 53 ÷ 8 + 726 + 12

⇒ 254   – 52   – 43   – 16   = (?)² – 742 + 726 + 12

⇒ 75 - 30 - 16 - 212   = (?)² – 4

⇒ 2712   = (?)²– 4

⇒ 94   = (?)²– 4

⇒ (?)² =   94    + 4 =  254   

⇒ ? =  52    = 2.5

For Video Solution Click on the link given below:

Karan Singh Chouhan

· commented

· 1 Months ago

Yet to be approved!
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