Question

tell some important formula and it's real time uses​

Answer 1

Explanation:

Algebra

Completing the square: x2+bx+c=(x+b2)2−b24+c.Quadratic formula: the roots of ax2+bx+c are −b±√b2−4ac2a.Circle: circumference=2πr, area=πr2.Sphere: vol=4πr3/3, surface area=4πr2.Cylinder: vol=πr2h, lateral area=2πrh, total surface area=2πrh+2πr2.

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