Question

What is the value of (—5)(—8)?

Answer 1

Answer:

40.

Step-by-step explanation:

$(-5)(-8) =( - 1) \times 5 \times (- 1) \times 8$

$= > ( - 1) \times ( - 1) \times 5 \times 8$

$= > we \: know \: that \: multiplication \: of \: two \: \\ negative \: number \: is \: the \: product \: of \: numbers\\ but \: without \: the \: minus \: sign : -$

$= > ( - 1) \times ( - 1) \times 5 \times 8 = 1 \times 5 \times 8$

$number \: multiplied \: by \: 1 \: remains \: the \\ same \: number \: so \: we \: can \: write \: it \: as : -$

$1 \times 5 \times 8 = 5 \times 8 = 40(by \: multiplication)$

$so : - \\ ( - 5) \times ( - 8) = 40$

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Answer 2

Answer:

40

Step-by-step explanation:

Explanation: (−5)(−8). =−×−+(5×8). [Since −×− is + ]. =+40. ~Hope this helps! :).