jojojojo5730
30.08.2020 •
Mathematics
Can someone show me the answer + how they got there? (x+4)(x-1)
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Ответ:
Explanation:
You can use the FOIL rule to expand out (x+4)(x-1), but here's another way you could do it.
Let y = x+4
This means we replace (x+4) with y to get y(x-1)
Distribute the y term through to get yx-y which can be written as x(y) - 1(y)
After this, replace y with x+4 getting x(x+4)-1(x+4)
Distribute a second time and simplify like so
x(x+4)-1(x+4)
x^2+4x-1x-4
x^2+3x-4
Ответ:
ginger ale: raspberry juice
1:2
Step-by-step explanation:
2:3(+1)
2:4
simplify to the smallest ratio
= 1:2