Answer:
ab-4a+cb-4c
Step-by-step explanation:
a(b-4)+c(b-4)
(b−4)(a+c)
68
70+2-4= 68
15 /2 , Square root of 64, 8.14, 8 1/7
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9
we know by definition that
so now we evaluate
and if we want to do an extra step
which works.