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aivan3 [116]
4 years ago
9

2(a -3) + 4b - 2(a -b -3) + 5 A. 6b+5 B. 8b-2 C. 6b-5 D. No simplified answer

Mathematics
2 answers:
Bond [772]4 years ago
8 0
Your answer is A. 6b+5
Grace [21]4 years ago
3 0
Let's simplify step-by-step.<span><span><span><span>
2<span>(<span>a−3</span>)</span></span>+<span>4b</span></span>−<span>2<span>(<span><span>a−b</span>−3</span>)</span></span></span>+5</span>
Distribute:<span>
=<span><span><span><span><span><span><span><span>(2)</span><span>(a)</span></span>+<span><span>(2)</span><span>(<span>−3</span>)</span></span></span>+<span>4b</span></span>+<span><span>(<span>−2</span>)</span><span>(a)</span></span></span>+<span><span>(<span>−2</span>)</span><span>(<span>−b</span>)</span></span></span>+<span><span>(<span>−2</span>)</span><span>(<span>−3</span>)</span></span></span>+5</span></span><span>
=<span><span><span><span><span><span><span><span><span>2a</span>+</span>−6</span>+<span>4b</span></span>+</span>−<span>2a</span></span>+<span>2b</span></span>+6</span>+5</span></span>
Combine Like Terms:<span>
=<span><span><span><span><span><span><span>2a</span>+<span>−6</span></span>+<span>4b</span></span>+<span>−<span>2a</span></span></span>+<span>2b</span></span>+6</span>+5</span></span><span>
=<span><span><span>(<span><span>2a</span>+<span>−<span>2a</span></span></span>)</span>+<span>(<span><span>4b</span>+<span>2b</span></span>)</span></span>+<span>(<span><span><span>−6</span>+6</span>+5</span>)</span></span></span><span>
=<span><span>6b</span>+5</span></span><span>
Answer : </span>=6b+5
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Answer:

30. 2x²-x-1=0

or, 2x²-2x+x-1=0

or, 2x(x-1)+1(x-1)=0

or, (x-1)(2x+1)=0

so, x-1 = 0 or, x = 1

and 2x+1 = 0 or, 2x = -1 or, x = -1/2

so, x = 1 and 1/2

31. 3x²-14x=5

or, 3x²-14x-5=0

or, 3x²-15x+x-5=0

or, 3x(x-5)+1(x-5)=0

or, (x-5)(3x+1)=0

so, x-5=0 or, x=5

and 3x+1=0 or, 3x=-1 or, x=-1/3

so, x = 5 and -1/3

Answered by GAUTHMATH

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3 years ago
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