Question

[hmmmm]

a) 5.2² + (x + 3) = 5²               b) 2³ + (x – 3²) = 5³ - 4³

Answer 1

[ปริมาณ.vn]

a) 5.2² + (x + 3) = 5²

5.4 + (x + 3) = 25

20 + (x + 3) = 25

x + 3 = 25 – 20

x + 3 = 5

x = 5 – 3 = 2

b) 2³ + (x – 3²) = 5³ - 4³

8 + (x – 9) = 125 – 64

8 + (x – 9) = 61

x – 9 = 61 – 8

x – 9 = 53

x = 53 + 9 = 62

Answer 2

[Nhan Thanh]

a) \(5.2^2+\left(x+3\right)=5^2\)

\(x+3=5^2-5.2^2\)

\(x+3=25-20\)

\(x+3=5\)

\(x=2\)

b) \(2^3+\left(x-3^2\right)=5^3-4^3\)

\(8+\left(x-9\right)=125-64\)

\(x-9=53\)

\(x=62\)