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 ࿐
(12,1):12³+1³=1728+1=1729
(10,9): 10³+9³=1000+729=1729
☺☺☺☺
Answer:
z=−215z=-215
Step-by-step explanation:
z=−215z=-215