If is an operation such that for integers a and b we have
a b = a × a + b × b – a × b, then find
(-4) 2.
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Answered by
0
Answer:
the answer is 28 .
Step-by-step explanation:
ab = axa + bxb - axb
(-4)2 = -4x-4 + 2x2 - (-4) x 2
= 16 + 4 +8. = 28.
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Answered by
0
Step-by-step explanation:
According to question
ab = a x a + b x b - a x b
so ab = a² + b² - ab
also ab = a² + b² - ab
then ab = a² + b² - ab
let a be -4 and b be 2
(-4)2 = -4² + 2² - 2(-4)
(-4)2 = 16 + 4 + 8
(-4)2 = 28
then 28 is correct answer
hope it helps
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