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