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a) sqrt(x+2) + sqrt(x^2 +x+2) =2x + sqrt(2x+1)
b) sqrt(2x+1) > sqrt(2×(x^2+1) +x-1
c) sqrt^4(2x-1) +sqrt(2x-1) =2×(sqrt^4x + sqrt(4)-1)
d)13×sqrt(x-x^2)+ 9×sqrt(x+x^2)=16
b) sqrt(2x+1) > sqrt(2×(x^2+1) +x-1
c) sqrt^4(2x-1) +sqrt(2x-1) =2×(sqrt^4x + sqrt(4)-1)
d)13×sqrt(x-x^2)+ 9×sqrt(x+x^2)=16