3. 152 i think that is it
Again here we're using like terms
a) -2x² + 12x² = 10x² (they have the same term that's why I grouped them together)
-4x + 2x = -2x
13 - 25 = -12
So the final answer is 10x² - 2x -12
b) 7x² - (-7x²) = 7x² + 7x² or 14x²
4x - (-3x) = 4x + 3x or 7x
-26 - 15 = -41
The final answer to this one is 14x² + 7x - 41
The only way for you to get an answer is by doing $5.25x2=$10.5 and $3.50x3=$10.50
Answer:
B) scale <em>z </em>by a factor of 1/2 and rotate it 5 degrees clockwise