Question

Tìm x

5^2x-3-2.5²⁼5².3

Answer 1

5^2x-3 - 2.5² = 5².3

5^2x-3 = 5².3 + 2.5²

5^2x-3 = 5².(3 + 2)

5^2x-3 = 5².5 = 5³

=> 2x - 3 = 3

=> 2x = 3 + 3

=> 2x = 6

=> x = 6 : 2

=> x = 3

Vậy x = 3

Answer 2

5^2x-3-2.5²⁼5².3

5^2x-3-50=75

5^2x-3=125

5^2x-3 = 5³

2x-3=3

2x=6

x=3

Answer 3

\(5^{2x-3}-2.5^2=5^2.3\)

\(=>5^{2x-3}=5^2.3+2.5^2\)

\(=>5^{2x-3}=5^2.5\)đặt nhân tử chung nha

\(=>5^{2x-3}=5^3\)

\(=>2x-3=3\)

\(=>2x=3+3\)

\(=>2x=6\)

\(=>x=3\)

T nha các bạn thên mến

Answer 4

TỐN Diện tích