Question

math lover only explain
why minus into minus equal to plaus (-)×(-)=+​

Answer 1

Answer:

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Answer 2

$\huge\boxed{\underline{\underline{\green{\tt Solution}}}}$

We know that 1 is the Multiplicative Identity

So by using the property of Multiplicative Identity

We get

$( - 1) \times 1 = 1 \times ( -1 ) = - 1$

Again distributive law under multiplication states that

$a \times (b + c) = (a \times b) + (a \times c)$

Let us take

$a=−1,b=1,c=−1$

We get from above

$(−1) \times (1+(−1))=(−1) \times 1+(−1) \times (−1) \: ...........(1)$

Here

$(1+(−1))=0 \: \: and \: \: (−1) \times 1=−1$

From Equation (1)

$(−1) \times 0=−1+(−1) \times (−1)$

Since

$(−1) \times 0=0 \: \: and \: \: 0=−1+(−1) \times (−1)$

ADDITION gives

$1=(−1) \times (−1)$

Thus

Negative × Negative = Positive