Create two methods in java the first:  that takes a value from the user and tell whether it is null or not. Declared as: boolean isZero (float a) the second: Create a method delta() that takes three values, a, b and c, from the user which are the coefficients of a quadratic equation and returns the value of the delta, which is given by b 2 - 4ac (with a screenshot of the code please)

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Math class and its different methods

Java math class consists of arithmetic math methods that performs basic numeric operations such as finding the maximum or minimum of two values, rounding values, logarithmic functions, square root, and trigonometric functions, etc. The Math library functions can be accessed using the header Java.lang.Math. These math methods under Java math class are for our convenience.