What kind of polynomial is pqr?

• monomial

• binomial

• trinomial

(a² - b²)  is the product of:

• (a + b) ( a - b)

• (a + b) (a + b)

• (a - b) (a - b)

The  product of ( x + a)  and (x - b) is

• x² + (a - b)x - ab

• x² - (a - b)x - ab

• x² + (a - b)x + ab

The product of (a + b) and (a + b ) is

• a² + 2ab - b²

• a² - 2ab + b²

• a² + 2ab + b²

165.

The value of x² - 3 at x = -1  is

• -2

• -1

• -4

The value of - x² + 3 at x = -1  is

• 1

• 4

• 2

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