• (1 - 8x)²
• (1 + 8x)²
• (8 - x)²
• (8 + x)²
• #### 2.  The factorisation x² + x + $$\frac{1}{4}$$ is

• ($$\frac{x}{2}$$ - 1)²
• ($$\frac{x}{2}$$ + 1)²
• (x + $$\frac{1}{2}$$)²
• (x - $$\frac{1}{2}$$)²
• #### 3.  The value of 99² is

• (90)² + 2(90)(9) + (9)²
• (90)² - 2(90)(9) + (9)²
• (90)² + (9)²
• none of these
• #### 4.  The value of 49² is

• (50)² - 2(50)(1) + (1)²
• (50)² + 2 (50) (1) + (1)²
• (50)² - (1)²
• (50)² + (1)²
• #### 5.  The factorisation of ($$\frac{x^2}{y^2}$$ -2+$$\frac{y^2}{x^2}$$) x ≠ 0, y ≠ 0 is

• ($$\frac{x}{y}$$+$$\frac{y}{x}$$)²
• ($$\frac{x}{y}$$-$$\frac{y}{x}$$)²
• ($$\frac{x}{y}$$-1)²
• ($$\frac{x}{y}$$+1)²

• 1
• 0
• 0.73
• 0.27
• #### 7.  The factorisation of x² - 9 is

• (x - 3)²
• (x + 3)²
• (x + 3)(x - 3)
• none of these
• #### 8.  The factorisation of 36x²y² - 1 is

• (6xy - 1)(6xy + 1)
• (6xy - 1)²
• (6xy + 1)²
• (6 + xy)²
• #### 9.  The value of $$\frac{0.564×0.564×-0.436×0.436}{0.564-0.436}$$ is

• 0
• 1
• -1
• none of these
• #### 10.  The value of (0.68)² - (0.32)² is

• -1
• 0
• 1
• 0.36
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