Assessment:Product of ploynomials special case

(x - 8) ( x - 8) = ______

• x² - 64
• x² + 64
• x² - 16x + 64
• x² + 16x + 64

If a+b=7, ab = 10, find a² + b²

• 28

• 29

• 30

• 27

product of 51 X 49 find using the identity -------------- and product is --------

• ( a-b) (a + b) = a² -b² , 2499

• (x + a) ( x + b ) = x² + (a + b) x ab , 2499

• (a+b)² = a² + 2ab + b² , 2499

• (a - b)² = a² - 2ab + b² , 2499

 $\left(\frac{2m}{3}\ +\ \frac{3n}{2}\right)^2$   is

•  $\frac{4m}{2}+2mn\ +\ \frac{9n}{4}$  

•  $\frac{4m^2}{2}\ +\ 2mn\ +\ \frac{9n^2}{4}$  

•  $\frac{4m^2}{9}+\ 2mn\ +\ \frac{9n^2}{4}$  

•  $\frac{4m^2}{9}-\ 2mn\ \ +\ \frac{9n^2}{4}$  

The value of (2x+3y+z)² is

• 4x²+5y²+2y²+12xy+5yz+2xz

• 4x²+9y²+z²+12xy+6yz+4zx

• x²+3y²+z²+6xy+5yz+6zx

• none of these.

Use identity to find , (x-6)(x-19)

• x² - 25x +114

• x² - 25x -114

• x² + 25x +114

• x² + 25x -114

Find (2l – 3m + 4n)²

• 4l² - 9m² + 16n² – 12lm + 24mn + 16nl

• 4l² + 9m² + 16n² + 12lm – 24mn + 16nl

• 4l² + 9m² + 16n² – 12lm + 24mn + 16nl

• 4l² + 9m² + 16n² – 12lm – 24mn + 16nl

The value of 8x³+36x²y+54xy²+27y³ is

• (2x+3y)³

• (2x-3y)³

• (x-3y)³

• (x+3y)³

Which of the following expressions is equivalent to the expression 945 × 855?

• 900² − 45²
• 900² + 45²
• 900² + (45 + 55) 900 + (45 × 55)
• 800² + (45 + 55) 800 + 45 × 55