Question

sos me (10х – 5)^2 - (8х – 3)^2 + 4х , якщо х= - 3.

Answer 1

$(10\cdot(-3)-5)^2 - (8\cdot(-3)-3)^2 + 4\cdot(-3)=(-30-5)^2-(-24-3)^2-12=(-35)^2-(-27)^2-12=1225-729-12=484$