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

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

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then i might be able to .

98%

step-by-step explanation: