Answer:
Given,
Now,
Use the algebraic identity ⇻ (a - b)² = a² - 2ab + b²
✐ So, the value of 9x² + 4y² - 1 is <u>24 + 12xy</u>
Now,
xy = - 2
So, 12xy = 12 × - 2 =<u> - 24</u>
•°• 24 + 12xy
= 24 + (-24)
= 24 - 24
= <u>0</u>
<h3>⎆ The value of 9x² + 4y² - 1 is <u>0</u>.</h3>ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
# ꧁❣ RainbowSalt2²2² ࿐
Answer:
Sarah makes 8 rows of squares.
Step-by-step explanation:
Given:
Number of squares she uses = 48
Number of squares in each row = 6
We need to find the number of rows she can makes.
Solution:
Let the number of rows she can make be .
Now we can say that;
Number of rows she can make is equal to Number of squares she uses divided by number of squares in each row.
framing in equation form we get;
Hence Sarah makes 8 rows of squares.