Question

помогите пожалуйста ​

Answer 1

$(x + 5) {}^{2} - 8(x + 5) = {x}^{2} + 10x + 25 - 8x - 40 = {x }^{2} + 2x - 15 = {(0.25)}^{2} + 2 \times 0.25 - 15 = 0.0625 + 0.5 - 15 = 0.5625 - 15 = - 14.4375$