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oVcper
21.08.2019 •
Mathematics
What two numbers multiply to get neg 240 and what two same numbers add to get neg 8
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Ответ:
x*y=-240240
x+y=-8 < you can rearrange this as x=-8-y
Now substitute in this rearrangement
(-8-y)*y=-240
-8y-y² =-240 (add y² and 8y)
0=y²+8y-240 (now factorise the equation)
0=(y+20)(y-12) (for 2 things to multiply and equal zero one or both has to equal zero)
so y+20=0 and/or y-12=0
so y=-20 or y=12
Now substitute these into x+y=-8 to get x
y=-20 then x=12
y=12 then x=-20
Ответ:
15/3 - 6p/3 = 4 - 2p
5 - 2p = 4 - 2p
1 = 0 ???