Use a polynomial Identity to expand this squared binomial (x + 6)2
1 answer:
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Answer:
<u>Step-by-step explanation:</u>
x - 2 = -4y → x = 2 - 4y
3x + 2y = 11
3(2 - 4y) + 2y = 11 <em>replaced "x" with (2 - 4y)</em>
6 - 12y + 2y = 11 <em>distributed "3" on left side</em>
<em> </em>6 - 10y = 11 <em>added like terms (-12y + 2y)</em>
- 10y = 5 <em>subtracted "6" from both sides</em>
y <em>divided both sides by -10</em>
Next, solve for x:
x = 2 - 4y
= 2 + 2
= 4
Step-by-step explanation:
In trapezoid ABCF, AB || CF.
Therefore, parallelograms ABEF & ABCD have same height and lie on the same base AB.
From equations (1), (2) & (3), we find:
Thus, the two triangular pieces of land are equal in area.
Hence proved.