hich equation doesn’t belong? Explain your answer. a) 15=−5∙−3 b) 2+(−5)=−3 c) 4−(−2)=6 d) −3∙−4=−1

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A: Given that: The equation is  12 z2 = - 3  .

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A: It is an Cauchy Euler differential equation

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A: Given- y=x2-1 To verify- That the above function is the solution of y'4+y2=-1.

Q: 8- By using Diret metheds solve the linear algebric Equation e- 15X + 3 y + 27 = 85 X - 2 y + 82= 5…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.