70² = 4a² + 3a² dit : a = ?? tlg ya

[tex] {70}^{2} = 4 {a}^{2} + 3 {a}^{2} \\ 4900 = 7 {a}^{2} \\ {a}^{2} = 4900 \div 7 \\ {a}^{2} = 700 \\ a = \sqrt{700} [/tex]

70^2 = 4a^2 + 3a^2
4900 = 7a^2
a^2 = 4900/7
a^2 = 700
a = V700
a = V(7 × 100)
a = V7 × V100
a = V7 × 10
a = 10V7