caplode7497
22.09.2019 •
Mathematics
'which of the following is equivalent to the expression (x+3)(x-7)+(x+8)(x+3)? ' i use the distributive property and added etc. and my outcome was 2x^2+7x+3. i got the answer as (2x+1)(x+3) but only because it was an answer choice and was equivalent to 2x^2+7x+3. where did the 1 and 3 come from in (2x+1)(x+
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Ответ:
First 2x * x = 2x²
Outer 2x *3x = 6x
Inner 1 * x= x
Last 1 * 3= 3
2x²+6x+x+3
2x² + 7x +3
Ответ:
c ; Since -2 is rational and square 3 is irrational, the sum and difference are irrational.
Step-by-step explanation: Just took the test