Simplify(7x+11y)(7x-11y) and find the value for x=3and y=5
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Answered by
6
Put x = 3, y = 5
= [7(3) + 11(5)][7(3) - 11(5)]
= ( 21 + 55 ) ( 21 - 55 )
= 76 × -34
= -2584
Anonymous:
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Answered by
7
Substituting the value of x=3 and y=5, we get :-
==> (7×3+11×5)(7×3-11×5)
==> (21+55)(21-55)
==> 76 × -34
==> -2584
Answer ==> -2584.
While multiplying the integers, we need to keep something in mind :-
To multiply postive integers :-
Simply multiply them.
Example - 2×5 = 10
To multiply negative integers :-
●If we multiply negative Integers even number of times , we get a positive integer
Example = -4 × -5 = 20
●If we multiply negative Integers odd number of times we get a negative Integer.
Example = -4 × 5 = -20
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