Calculation process of ∫ (1, - 1) √ x ^ 2 definite integral Such as the title ∫ (1, - 1) √ x ^ 2 definite integral calculation

Calculation process of ∫ (1, - 1) √ x ^ 2 definite integral Such as the title ∫ (1, - 1) √ x ^ 2 definite integral calculation


∫(1,-1)√x^2dx
=∫(1,-1)|x|dx
This is an even function
=∫(1,0)2xdx
=x²(1,0)
=1