Special Products · Exercise 49
Mental math You can use the product of conjugates pattern to multiply numbers without a calculator. Say you need to multiply 47 times 53. Think of 47 as and 53 as .
ⓐ Multiply by using the product of conjugates pattern, .
ⓑ Multiply without using a calculator.
ⓒ Which way is easier for you? Why?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Elementary Algebra 2e · §6.4 Special Products · Exercise 49
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