Step-by-step explanation:you just have to add the angles 66 and 62 which will give you 128 which you will subtract from 180 degrees which is the sum of all the angles in every triangle and you will get your answer 52
To find the answer to this, you have multiply both expressions by each other. To do this, you have to multiply each term in the first expression by each term in the second expressions. This yields the following: 3x^4-9x^3-3x^2+5x^3-15x^2-5x+10x^2-30x-10. Combing like terms and simplifying gives the final expression: 3x^4 - 4x^3 - 8x^2 - 35x - 10