Use Square of Sum: (a + b)^2 = a^2 + 2ab + b^2
b^2 + 2b * 12 + 12^2
Simplify 12^2 to 144
b^2 + 2b * 12 + 144
Simplify 2b * 12 to 24b
b^2 + 24b + 144
Answer:
75%
Step-by-step explanation:
9 ÷ 12 = 0.75 = 75%
Answer:
12 * 50 = 600
Step-by-step explanation:
We have to multiply 12 by 50
<u>Short cut method for multiplying a number by 50</u>
Step 1: Take the half of the given number
Step 2: Multiply the result by 100
<u>To find the short cut method to multiply 12 by 50</u>
Here the number is 12
Step 1: divide the number by 2
12/2 = 6
Step 2: Multiply 6 by 100 we get 600
Therefore 12 * 50 = 600
12in.=1ft
so 240in./12in. = 20ft
