If b=0 in a quadratic equation ax2+bx+c = 0, then equation is called

• Quadratic

• Pure quadratic

• Standard form

• None of these

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Explanation: If b=0 in a quadratic equation ax²+bx+c = 0, then the equation is called a pure quadratic or a simple quadratic. A pure quadratic is a type of quadratic equation where the coefficient of the x term is zero. In other words, there is no x term present in the equation, and only the squared term and the constant term are present.

This means that the equation simplifies to the form of ax² + c = 0, where a and c are constants.

Pure quadratics are a special case of quadratic equations, and they can be easier to solve than other types of quadratic equations because there is only one variable present in the equation.