7x - 1 = 20
7 times 3 is 21, 21 minus 1 is 20
We know the algebraic identity: (a - b)(a + b) = a^2 + b^2. Therefore, we should square 3 and 4x.
- = (3)^2 - (4x)^2
- 9 - 16x^2
<u>Answer</u><u>:</u>
<u>9</u><u> </u><u>-</u><u> </u><u>1</u><u>6</u><u>x</u><u>^</u><u>2</u>
Hope you could understand.
If you have any query, feel free to ask
Answer:
Step-by-step explanation:
Answer:
you need to add and then subtract and the anw=sewr wi;l be 14567890 .happy and boom your done
Step-by-step explanation:
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