Modules 2 nd 3
Write the letter of the correct answer.
1. The are a square is 4x2 + 20% + 25 m2. Find the measure of each side.
a. 2x + 5 m
c. 2x + 10 m
b. 2x-5 m
d. 2x - 10 m
2. Forty-nine less than the square of a number is 0. Find the number.
a. -3 or 3
C. -13 or 13
b. -7 or 7
d. O or 9
3. Four times the square of a number is 20 times that number. Find the number.
a. 0 or 1
c. O or 10
b. O or 5
d. 0 or 20
4. Find the area of a rectangle whose length is x + 7 cm and width is x - 7 cm.
a. X2 + 14 cm2 C. x2 + 49 cm2
b. X2 - 14 cm? d. x2 - 49 cm2
5. Which is the area of a square whose side measures 3x - 4 units?
a. 9x2 - 12x + 16
c. 9x2 - 24x + 16
b. 9x2 + 12x + 16
d. 9x2 + 24x + 16
6. Which is the measure of a side of a square whose area is 4x2 + 4x + 1 square units
a. 2x - 1 units
c. 2x + 2 units
b., 2x + 1 units
d. 2x - 2 units
7. Find the dimension of a rectangular pond whose area measures 25x2 - 49 cm?
7 cm​