Simple, it is equal to |4|, you have to draw the lines around the 4 on the worksheet.
X^2 - 14 = -10
x^2 = -10 + 14
x^2 = 4....take the square root of both sides, eliminating the ^2
x = (+-) sqrt 4
x = 2 and x = -2
3(5b+1)(5b-1)
hope it helps
Part A:
13²-5²=c
169-25=144
√144=12
Your height is 12.
Part B:
Base:
20(10)=200
Two triangular faces:
5(13)=65
65(2)=130
Rectangular faces:
20(13)=260
260(2)=520
200+130+520=850
They would need 850 cm of cardboard.
Hope this helps! Have an amazing day!
