Use identity to expand: (7x + 8)(7x – 8).
Correct answer(s):
- 49x^2 - 64
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Expand and simplify: (9x – 5)^2.
Correct answer(s):
- 81x^2 - 90x + 25
Expand and simplify: (x + 10)^2. [Unique SSC algebra item 2]
Correct answer(s):
- x^2 + 20x + 100
Use identity to expand: (8x + 1)(8x – 1).
Correct answer(s):
- 64x^2 - 1
Expand and simplify: (9x – 8)^2.
Correct answer(s):
- 81x^2 - 144x + 64
Expand and simplify: (x + 4)^2.
Correct answer(s):
- x^2 + 8x + 16
Use identity to expand: (11x + 2)(11x – 2).
Correct answer(s):
- 121x^2 - 4
Expand and simplify: (2x – 5)^2.
Correct answer(s):
- 4x^2 - 20x + 25
Expand and simplify: (x + 10)^2.
Correct answer(s):
- x^2 + 20x + 100
Use identity to expand: (6x + 8)(6x – 8).
Correct answer(s):
- 36x^2 - 64
Expand and simplify: (6x – 7)^2. [Unique SSC algebra item 2]
Correct answer(s):
- 36x^2 - 84x + 49
Expand and simplify: (x + 7)^2.
Correct answer(s):
- x^2 + 14x + 49
Use identity to expand: (4x + 6)(4x – 6).
Correct answer(s):
- 16x^2 - 36
Expand and simplify: (6x – 7)^2.
Correct answer(s):
- 36x^2 - 84x + 49
Expand and simplify: (x + 2)^2.
Correct answer(s):
- x^2 + 4x + 4
Use identity to expand: (7x + 9)(7x – 9).
Correct answer(s):
- 49x^2 - 81
Expand and simplify: (9x – 1)^2.
Correct answer(s):
- 81x^2 - 18x + 1
Expand and simplify: (x + 5)^2.
Correct answer(s):
- x^2 + 10x + 25
Solve the simultaneous equations: 1x + 3y = -11 and 1x + 1y = -5.
Correct answer(s):
- x = -2, y = -3
Solve the simultaneous equations: 4x + 1y = 0 and 4x + 3y = 8.
Correct answer(s):
- x = -1, y = 4