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Q.7 If (5)$^{x-3}$ x (3)$^{2x-8}$ = 225, then find the value of x. Q.8 If x = (5 + 2$\sqrt{6}$), show that $\sqrt{x}$ + $\frac{1}{\sqrt{x}}$ = ± 2$\sqrt{3}$. Q.9 If a = $\frac{1}{7 - 4\sqrt{3}}$ and b = $\frac{1}{7 + 4\sqrt{3}}$, then find the values of

          Q.7 If (5)$^{x-3}$ x (3)$^{2x-8}$ = 225, then find the value of x.
Q.8 If x = (5 + 2$\sqrt{6}$), show that $\sqrt{x}$ + $\frac{1}{\sqrt{x}}$ = ± 2$\sqrt{3}$.
Q.9 If a = $\frac{1}{7 - 4\sqrt{3}}$ and b = $\frac{1}{7 + 4\sqrt{3}}$, then find the values of

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Q.7 If (5)^x-3 x (3)^2x-8 = 225, then find the value of x.
Q.8 If x = (5 + 2√(6)), show that √(x) + (1)/(√(x)) = ± 2√(3).
Q.9 If a = (1)/(7 - 4√(3)) and b = (1)/(7 + 4√(3)), then find the values of

Added by Lisa W.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

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