multiply 2x²-2x by 3x
Answers
Answered by
0
Correct option is
B
10x
3
−11x
2
+19x+10
We have
(2x
2
−3x+5)×(5x+2)
(2x
2
−3x+5)×5x+(2x
2
−3x+5)×2
(10x
3
−15x
2
+25x)+(4x
2
−6x+10)
10x
3
−11x
2
+19x+10
Answered by
0
Answer:
Simplify (4x2 – 4x – 7)(x + 3)
Here's what the multiplication looks like when it's done horizontally:
(4x2 – 4x – 7)(x + 3)
(4x2 – 4x – 7)(x) + (4x2 – 4x – 7)(3)
4x2(x) – 4x(x) – 7(x) + 4x2(3) – 4x(3) – 7(3)
4x3 – 4x2 – 7x + 12x2 – 12x – 21
4x3 – 4x2 + 12x2 – 7x – 12x – 21
4x3 + 8x2 – 19x – 21
That was painful! Now I'll do it vertically:

That was a lot easier! But, by either method, the answer is the same:
4x3 + 8x2 – 19x – 21
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