Factor by grouping. $$4st + 22t - 10s - 55$$ $$4st + 22t - 10s - 55 = \Box$$
Added by Joan N.
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Step 1: Group the terms. We can group the first two terms and the last two terms: $$(4st + 22t) - (10s + 55)$$ Note that when factoring out a negative sign from the last two terms, the sign of the second term inside the parenthesis changes from -55 to +55. Step Show more…
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