pls solve with working plss I will mark you the brainiest if u are right
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3answer Use am÷an=(a)m−n and am×an=am+n and a−m=am1
∴(25+28)×(2)−7=(2)5−8×(2)−7
=(2)−3×(2)−7
=(2)−3−7=(2)−10=2101=10241
5 It is given that:
X[142536]=[−72−84−96]
The matrix given on the R.H.S. of the equation is a 2×3 matrix and the one given on the L.H.S. of the equation is a 2×3 matrix.
Therefore, X has to be a 2×2 matrix.
Now, let X=[abcd]
Therefore, we have:
[abcd][142536]=[−72−84−96]
⇒[a+4cb+4d2a+5c2b+5d3a+6c3b+6d]=[−72−84−96]
Equating the corresponding elements of the two matrices, we have:
a+4c=−7b+4d=2
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