→a² -a + 2a - 2
→a²+ a - 2
why does the first equation expand to the second one?
Answers
Answered by
1
Answer:
since -a+2a=a
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Answered by
1
Answer:
Given equation (i) = a² - a + 2a - 2
a will be subtracted from 2a since a is with negative sign.( - a + 2a ) or ( 2a - a = a )
new equation will be a² + a - 2
solution:
a² + a -2
a² + 2a - a -2
a (a + 2) -1 (a + 2)
(a - 1) (a + 2 ) = 0
a = 1 and a = - 2.
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