Question

(5 mũ 2+ 3 mũ 2).x + (5 mũ 2-3 mũ 2). x=10 mũ2

Answer 1

\(\left(5^2+3^2\right).x+\left(5^2-3^2\right).x=10^2\)

\(\Rightarrow x.\left(5^2+3^2+5^2-3^2\right)=10^2\)

\(\Rightarrow x.\left(25+9+25-9\right)=100\)

\(\Rightarrow x.50=100\)

\(\Rightarrow x=100:50=2\)

\(KL:......................\)

Answer 2

( 5² + 3² ) . x + ( h² - 3² ) . x = 10²

=> ( 25 + 9 ) . x + ( 25 - 9 ) . x = 100

=> 34 . x + 16 . x = 100

=> x ( 34 + 16) = 100

=> x . 50 = 100

=> x = \(\frac{100}{50}\)

Vậy x = 2

Answer 3

x=2

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