6 to the 2nd + 3 to the second = d to the 2nd

6.70820 or the square root of 45

Step-by-step explanation:

6^2 = 36

3^2 = 9

36 + 9 = 45

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3