C if a number is substituted for x a numerical value

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ement for “x”. C. If a number is substituted for “x”, a numerical value for the function is found. D. If a non-numerical quantity is substituted for “x”, an expression is found rather than a numerical value. E. Careful use of parentheses is essential! IV. Examples using f(x) = 3 x2 − 4x − 5 A. f(4 ) = 3(4 )2 − 4(4 ) − 5 = 27 B. f ( −3 ) = 3( −3)2 − 4(− 3 ) − 5 = 34 C. f(a) = 3a2 − 4a − 5 D. f(2 a − 3) = 3(2a − 3) 2 − 4(2a − 3 ) − 5 = 3(4a2 − 12a + 9) − 8a + 12 − 5 = 12a2 − 36a + 27 − 8a + 12 − 5 = 12a2 − 44a + 34 2 2 2 E. f(...
View Full Document

Ask a homework question - tutors are online