Question

Situación problematiaca de (x-5)(x+5)=56

Answer 1

${x}^{2} + ( - 5 + (5))x + ( - 5)(5) = 56 \\ {x}^{2} + (0)x + ( - 25) = 56 \\ {x}^{2} + 0 - 25 = 56 \\ {x}^{2} - 25 = 56 \\ {x}^{2} = 56 + 25 \\ {x}^{2} = 81 \\ x = \sqrt{81} \\ x = 9$