(x+y)^2=x^2 + 2xy + y2, subsitute (-2) for x,and (-1) for y, and check if the left hand side is equal to right hand site, also perform this problem in (x+y)^3=x^3+3x^2y+3xy^2+y^3 .

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A:

Q: find x and y if (2x+1,y)=(5x+4, -7)

A: Given: 2x+1,y=5x+4,-7

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Q: 4. Express (-23+ j2) in rectangular form.

A: Let's find.

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Q: 2(

A: We have to simplify the following algebraic expression: -xy23x5y4

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A: SOLUTION-

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Q: If (x+2y) = -4 and (3x) = 6, then

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Q: If x^2 + y^2 =14 and x+y=6, find xy.

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A: Solution :-

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Q: When x= 4 , y = 2 , and z = 3 , what is the value of x^2 + 2y^2 + 3z^2 + 4?

A: We have to find

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A: