No. You can only add matrices of the same size.
30
-5
5(x + 2y2)(x2 - 2xy2 + 4y4)
Its called the product. For example, in the problem 5x3=15, 15 is the product.
A product is the answer when you multiply two or more numbers. 5x3=15 so 15 is the product. 21x2x1=42 so 42 is the product.
-6x3 + 4x7 - 0.8x2 + x4 - 5x5 = 4x7 - 5x5 + x4 - 6x3 - 0.8x2 = x2 (4x5 - 5x3 + x2 - 6x - 0.8)
None. 5x3 is a pure number, not a length.
What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3?
15
15
An expression. It can be factored out slightly too: 2x6 + 5x3 - 7x4 = x3(2x3 - 7x + 5)
30
no (5x3)
The answer is 21
5.3
12
-5