Write in Standard Form (3a^2-a+3)+(4a^2-5)

$(3 a^{2} - a + 3) + (4 a^{2} - 5)$

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Add $3 a^{2}$ and $4 a^{2}$ .

$7 a^{2} - a + 3 - 5$

Subtract $5$ from $3$ .

$7 a^{2} - a - 2$