What is the value of 3x - 5y when x - 1 and y - -1- 2- 8-2-8-

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Value of an Algebraic Expression

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What is the value of 3x - 5y when x = 1 and y = -1?

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(3 x^{2} - 7) (3 x^{2} - 8)

x = 1

3 x^{2} - 5 y - 2

5 y - 3 x^{2} + x y

Statement 1: The value of the polynomial \({x}^{5}+ 2{x}^{4}+ 3{x}^{3}+ {x}^{2}– 7x + 8\) at x = -1 is 14.

Statement 2: The polynomial \({x}^{5}+ 2{x}^{4}+ 3{x}^{3}+ {x}^{2}– 7x + 8\) when divided by x + 1, gives 14 as remainder.

8 - 3 (x + 2) = - 10

7 (2 y - 3) = 3 + 8 y;

: 3 x^{2} - 4 x y - 5 y^{2} .

\frac{3 x + 4 y}{2 x + 5 y} = \frac{4}{3}

9 x + 12 y = 8 x + 20 y

\frac{3 x + 4 y}{2 x + 5 y} = \frac{4}{3}

\frac{x}{y} = 8 \Rightarrow x : y = 8 : 1

3 (3 x + 4 y) = 4 (2 x + 5 y)

x = 8 y

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