Question

Check whether the following are quadratic equations (30-2x)(20-2x)=375​

Answer 1

Answer:

yes, it is a quadratic equation

Step-by-step explanation:

(30-2x)(20-2x)=375

600-40x-60x+4x²=375

4x²-100x=375-600

4x²-100x= - 225

4x²-100x+225=0

hence, it is a quadratic equation(proved)

Answer 2

Answer:

30(20-2x)-2x(20-2x)=375

600-60x-40x+4x²=375

4x²-100x+225=0

yes they are quadratic equations

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Step-by-step explanation: