1. Tính a.(x-3y).(x-3y)
b.49x^2-70x+25
2.Tìm x
1.(x+2)^2+(x-3)^2-2(x-1).(x+1)=9
2.(x+3).(x^2-3x+9)-x^3=2x
3.(x-2)^3-x^3+6x^2=7
*lưu ý: ^2=mũ 2,^3=mũ 3

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you have orange juice on wednesday. (idk why this is the answer)

step-by-step explanation:

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

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