Question

(ii) x3 + 2x2 = 5 is a quadratic equation.(true/false)
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Answer 1

x3 + 2x2 = 5 is a quadratic equation

The above statement is false.

As the the highest power in a quadratic equation should be a square but it's a cube.....x³ thus the x³ + 2x² = 5 is not a quadratic equation.

Answer 2

Answer:

x³+2x²=5 is not a quadratic equation.

So, given statement is false.

Step-by-step explanation:

Given equation is ${x}^{3} + 2 {x}^{2} = 5......(1)$

We want to find that given equation quadratic or not.

We know,

Quadratic equations are two-degree algebraic expressions and are of the form $a {x}^{2} + bx + c = 0$

By examples,we can understand this concept more easily.

We are taking a equation $2 {x}^{2} + 3x + 1 = 0$

This equation is a second degree equation and form of the equation is same as a quadratic equation.

So,

$2 {x}^{2} + 3x + 1 = 0$

is a quadratic equation.

Here given equation is ${x}^{3} + 2 {x}^{2} = 5$

or,${x}^{3} + 2 {x}^{2} - 5 = 0$

Degree of this equation is three.which is not followed condition of quadratic equation.

So, given equation is not a quadratic equation.

Know more about quadratic equation:

https://brainly.in/question/14781228

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