Answer:
49a^2 - 126ab + 81 ^2
Step-by-step explanation:
Suitable identity = (a-b)(a-b) = a^2 - 2ab + b^2
So, to solve this.
(7a-9b)(7a-9b) = 49a^2 - 126ab + 81b^2
Hope this helps
Answer:
x intercept is -7.5
Y intercept is 5.5
Step-by-step explanation:
Where the line crosses the x and y axis, 5.5 and -7.5
Slope of KL = 2/2 = 1.
Slope of MN = 2/2 = 1.
Slope of LM = -1/2.
Slope of NK = -1/2.
The slopes of opposite sides KL and MN are equal.
The slopes of opposite sides LM and NK are equal.
Since quadrilateral KLMN has two pairs of opposite sides that are parallel, it is a parallelogram.
It's useful so when you go to the grocery store you know how much of whatever you need and you can multiply, divide, and subtract if needed. Without mathematics we wouldn't be able to calculate things. If you're a cashier for example, you need to know how to count change and count the money the person gives you. If you're a customer, you need to know how much to give the cashier and that involves mathematics. I hope this helped!!!