How do you simplify $(t ^ { 2} - 5t - 4) + ( 2t ^ { 2} - 7t + 6)$ ?

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Answer 1 · 2018-01-20T05:44:40

$3t^2-12t+2$

$(t^2-5t-4)+(2t^2-7t+6)$
is the same as:
$t^2-5t-4+2t^2-7t+6$
This becomes, once reordered:
$t^2+2t^2-5t-7t-4+6$
Combine the like terms:
$3t^2-12t+2$

How do you simplify (t ^ { 2} - 5t - 4) + ( 2t ^ { 2} - 7t + 6)(t ^ { 2} - 5t - 4) + ( 2t ^ { 2} - 7t + 6)?