Answer:

3x^2 + 6x - 10= 0

Step-by-step explanation:

Step 1. Use distributive property

3x(x+2)=10

3x^2 + 6x =10

Step 2. put the constant to the left side

3x^2 + 6x =10

3x^2 + 6x - 10= 0

Note: 10 turned negative becoz it is put to the other side of the equal sign.

Step 3. Thus, the standard form of the guven quadratic equation is 3x^2 + 6x -10 = 0

thats the answer, i hope this helps:)