third binomial formula problem 2
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You can find more exercises after the end of this exercise.
Calculate the following binomials formulas:
a) (7a² + 2b) • (7a² – 2b) = ?
b) (1/8 e + 1/2 f) • (1/8 e – 1/2 f) = ?
a) answer:
(7a² + 2b) • (7a² – 2b) =
a² – b²
(7a² • 7a²) – (2b • 2b) =
49a4 – 4b²
b) answer:
(1/8 x + 1/2 y) • (1/8 x – 1/2 y) =
a² – b²
(1/8 x • 1/8 x) – (1/2 y • 1/2 y) =
1/64 x² – 1/4 y²
More problems:
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