Expand/ विस्तृत करें:(3x – 7)^2 = ?
Expand/ विस्तृत करें: $ (3x – 7)^2 $= ?
Detailed Solution & Logic
Correct Answer:
\(9x^2 - 42x +49\)
Use the identity $(a-b)^2 = a^2 - 2ab + b^2$.
$(3x - 7)^2 = (3x)^2 - 2(3x)(7) + 7^2$
$= 9x^2 - 42x + 49$
Answer: $9x^2 - 42x + 49$
Similar Practice Questions
If a + b +c = 14, ab + bc + ca = 47 and abc = 15, then the value of $ a^3 + b^3 + c^3 $ is
If a + b +c = 14, ab + bc + ca = 47 and...
Write the expanded form of $(9a + 8b + 2c)^2$
Write the expanded form of/ विस्तारित रूप लिखिए। $(9a + 8b + 2c)^2$
“Out of two boys, the elder’s age is three times the younger’s age. 9 years ago, it was five times the younger’s age. Find the present age of each.”
“Out of two boys, the elder’s age is three times the younger’s age. 9 years...
Select the option that is related to the fifth letter – cluster
Select the option that is related to the fifth letter – cluster in the same...
If $2^{3m}\times 8 = 2^9 \: and \: 3^{2n} \times 9 = 3{6}$ , then find the value $\frac{m}{n}$.
If $2^{3m}\times 8 = 2^9 \: and \: 3^{2n} \times 9 = 3{6}$ , then...
The profit made on a product is 49%. What is the loss percentage (rounded up to two decimal places) incurred on the sale if the figures of both the cost price and selling price are interchanged?
Rohan has ₹\((3x^2 + 5xy + 7y^2)\) in his pocket. He spent ₹ \((2x^2 +...
2 times the present age of X is 7 years less than 6 times the present age of Y.
2 times the present age of X is 7 years less than 6 times the...