Class 10 Math All topics Quadratic Equations

Find which of the following equations are quadratic:

$7x_{3}−2x_{2}+10=(2x−5)_{2}$

$7x_{3}−2x_{2}+10=(2x−5)_{2}$

Solution: $7x_{3}−2x_{2}+10=(2x−5)_{2}$

$⇒7x_{3}−2x_{2}+10=4x_{2}−20x+25$

$⇒7x_{3}−6x_{2}+20x−15=0;$

which is not of the general form ax $_{2}+bx+c=0$.

And it's a cubic equation.

Thus, the given equation is not a quadratic equation.

$⇒7x_{3}−2x_{2}+10=4x_{2}−20x+25$

$⇒7x_{3}−6x_{2}+20x−15=0;$

which is not of the general form ax $_{2}+bx+c=0$.

And it's a cubic equation.

Thus, the given equation is not a quadratic equation.

Similar topics

introduction to trigonometry

functions

some applications of trigonometry

quadratic equations

surface areas and volumes

introduction to trigonometry

functions

some applications of trigonometry

quadratic equations

surface areas and volumes

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