4a(a+1)-(2a-1)^2 7x(x-5)+(3x+1)^2 Упростите

Question

4a(a+1)-(2a-1)^2
7x(x-5)+(3x+1)^2
Упростите

Answer 1

4a(a+1)-(2a-1)^2=4a^2+4a-4a^2+4a-1=8a-1
7x(x-5)+(3x+1)^2=7x^2-35+9x^2+6x+1=16x^2+6x-34