2 years ago

How to solve this question? Show steps pls :)

Mathematics

1 answer:

Svetlanka [38]2 years ago

4 0

Answer:

Bro if u don't know the ques then ask ur mom or dad kid

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I NEED HELP ASAP!! Subtract. -30-27= ? -5-(-4)= ?

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-30-27= -57
When both numbers are negative, they are “added” in a sense, but remain negative.

-5-(-4)= -1
You have to multiply the (-4) by the “invisible” -1 on the outside before you add/subtract.

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What two numbers add to 9 and multiply to -70

Alborosie

X, y - the numbers

The numbers add to 9 and multiply to -70.
$x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
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(-x-5)(x-14)=0 \\
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x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
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