Question

If a = -3, value of -2a² is:​

Answer 1

Answer:

const value = 2

isNaN(value) //false

isNaN('test') //true

isNaN({}) //true

isNaN(1.2) //false

typeof 1 //'number'

const value = 2

typeof value //'number'

const value = 2

if (typeof value === 'number') {

 //it's a number

}

Step-by-step explanation:

Answer 2

$\red {\boxed{\star Step-by-step \: explanation \star}}$

$a = - 3$

 ‍ 

$= - 2 {a}^{2}$

$= - 2 \times ( - 3) {}^{2}$

$= - 2 \times 9$

$= - 18$

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