How many zeros are there in the polynomial function x^2 - 4?
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Step-by-step explanation:
The sum of two numbers is 50. a + b = 50 (Equation 1) a - b = 4 (Equation 2) a + b = 50 (Equation 1) b = 50 - a (subtract a from both sides) a - b = 4(Equation 2) a - (50 - a) = 4 (Substitution, replacing b with what we derived from Equation 1) a - 50 + a = 4 (Remove the parenthesis, multiply negative one to both 50
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