Question

a,\(\left(4.\sqrt{x-1}-7\right).\left(2-\sqrt{x-1}\right)=5-4x\)

b,\(\frac{2}{5}.\left(\sqrt{2x+1}+5\right)=\frac{1}{4}.\left(\sqrt{2x+1}-1\right)\)

mn ơi giúp mik vs :((