Chapter 3: Q.3 (page 166)

What is the value of $2 {(x + y)}^{2}$ when x= $3$ and y= $4$ ?
A. $28$
B. $50$
C. $98$
D. $2401$

Short Answer

Expert verified

The correct answer of this question is C $98$ .

Step by step solution

Step 1. Apply the concept of putting the given value of x and y.

In this, simply use the concept of putting the given value of $x = 3$ and $y = 4$ in the equation to get the correct answer.

Step 2. Find the solution of the equation

Here, the expression is simplified as:

$\begin{array}{l} 2 {(x + y)}^{2} = 2 {(3 + 4)}^{2} \\ = 2 (49) \\ = 98 \end{array}$

Step 3. Eliminating the options to get correct one

$28$ It is the incorrect option because after putting the given value of x& ythe answer is not equal to $28$ .
$50$ It is the incorrect option because after putting the given value of x& y the answer is not equal to $50$ .
$98$ It is the correct option because after putting the given value of x& y the answer is equal to $98$ .
$2401$ It is the incorrect option because after putting the given value of x& ythe answer is not equal to $2401$ .

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What is the value of $2 {(x + y)}^{2}$ when x= $3$ and y= $4$ ?
A. $28$
B. $50$
C. $98$
D. $2401$

Short Answer

Step by step solution

Step 1. Apply the concept of putting the given value of x and y.

Step 2. Find the solution of the equation

Step 3. Eliminating the options to get correct one

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What is the value of 2(x+y)2when x= 3 and y= 4?A. 28B. 50C. 98D.2401

Short Answer

Step by step solution

Step 1. Apply the concept of putting the given value of x and y.

Step 2. Find the solution of the equation

Step 3. Eliminating the options to get correct one

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Pure Maths

Geometry

Calculus

Statistics

Probability and Statistics

Mechanics Maths

Study anywhere. Anytime. Across all devices.

What is the value of $2 {(x + y)}^{2}$ when x= $3$ and y= $4$ ?
A. $28$
B. $50$
C. $98$
D. $2401$