Question

помогите пожалуйста

Answer 1

$\frac{49 {}^{2} - 2 \times 49 \times 29 + 29 }{49 {}^{2} - 19 {}^{2} } = \frac{49 {}^{2} - 2842 + 29 }{(49 - 19)(49 + 19)} = \frac{2401 - 2842}{30 \times 68} = \frac{ - 412}{2040} = \frac{ - 103}{510} = - \frac{103}{510}$

Answer 2

49^2-2*49*29+29/49^2-19^2=49^2-2842+29/(49-19)(49+19)=2401-2813/30*68=-412/2040=-103/510