The expressions that are equal to a rational number are [(2/3)+(4/5)], [(√3) - (√3)], and [(√49)(√1)].
- A rational number is one that can be stated as the ratio of two numbers, with the denominator not equal to zero.
- All real numbers that are not rational numbers are referred to as irrational numbers. The ratio of two integers cannot be used to express irrational values.
- (a) π√4
- π√4 is equal to 2π, which is an irrational number.
- (b) (2/3)+(4/5)
- (2/3)+(4/5) = (22/15), which is a rational number.
- (c) (√36)-(√5)
- (√36)-(√5) = 6-√5, which is an irrational number.
- (d) (√3)-(√3)
- (√3)-(√3) = 0, which is a rational number.
- (e) (√49)(√1)
- (√49)(√1) = 7*1 = 7, which is a rational number.
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