If A−$$2B=1$$ $$53$$ $$7$$ and $$2A$$−$$3B=$$−$$2$$ $$50$$ $$7$$, then matrix B is equal to

Correct option is 1−4 −5−6 −7

Questions

If $A - 2 B = [\begin{array}{ll} 1 5 \\ 3 7 \end{array}]$ and $2 A - 3 B = [\begin{array}{rr} - 2 5 \\ 0 7 \end{array}]$ , then matrix B is equal to

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−4 −5−6 −7

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2 −13 2

6 −10 1

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detailed solution

Correct option is A

We have B=(2A−3B)−2(A−2B)=−4 −5−6 −7

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If A−2B=1 53 7 and 2A−3B=−2 50 7, then matrix B is equal to

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Ready to Test Your Skills?

free study material

If $A - 2 B = [\begin{array}{ll} 1 5 \\ 3 7 \end{array}]$ and $2 A - 3 B = [\begin{array}{rr} - 2 5 \\ 0 7 \end{array}]$ , then matrix B is equal to