Haven't done these in a while but this should be the answer.
Hope this helps!
Let's simplify step-by-step.<span><span><span>a+7b</span>−<span>10ab</span></span>+a</span><span>=<span><span><span><span>a+7b</span>+</span>−<span>10ab</span></span>+a</span></span>Combine Like Terms:<span>=<span><span><span>a+7b</span>+<span>−<span>10ab</span></span></span>+a</span></span><span>=<span><span><span>(<span>−<span>10ab</span></span>)</span>+<span>(a+a)</span></span>+<span>(7b)</span></span></span><span>=<span><span><span>−<span>10ab</span></span>+2a</span>+7b</span></span>Answer:<span>=<span><span><span>−<span>10ab</span></span>+2a</span>+7b</span></span>
Using the quadratic equation instead of calculus, you can find the x coordinate of the vertex as it will be the midpoint of the two x coordinates of the zeros...
x=(-3±√-27)/2
x=-1.5±√-6.75
That the second term is imaginary does not matter because we will add or subtract this value from -1.5, thus the midpoint of the zeros, the x coordinate of the vertex is -1.5. And to find the value of y for the vertex we just find the value of y when x=-1.5
y(-1.5)=6.75
Since y>0, the vertex is above the x-axis.
Answer:
<h3><em>X=14.4</em></h3>
<em>Step-by-step explanation:</em>
<em>As triangles are similar </em>
<em>The ratio of the sides must be equal</em>
<em>so..</em>
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<em>hope it helps...</em>
<em>have a great day!!</em>
