Find the value of -12-21-

The correct option is A 252 As ( ve) × (+ve)= ve ∴ 12× +21= 252 ...

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Standard VI

Mathematics

Additive Identity

Find the valu...

Question

Find the value of $(- 12) \times (+ 21) .$

- 2412

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- 242

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- 252

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+ 252

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Solution

The correct option is A $- 252$
As $(- v e) \times (+ v e) = - v e$
$∴ - 12 \times + 21 = - 252$

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A two digit number is such that the product of its digits is 28. When 112 is subtracted from the number, the digits interchange their places. Find the second degree equation in x from which we can find tens digit.

299/12 x 13.95 +?=252

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Find the value of (−12)×(+21).

The correct option is A −252As (−ve)×(+ve)=−ve∴−12×+21=−252

Find the value of $(- 12) \times (+ 21) .$

The correct option is A $- 252$
As $(- v e) \times (+ v e) = - v e$
$∴ - 12 \times + 21 = - 252$