Question

(2а+7в)²⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️​

Answer 1

Ответ:

4а²+2•2а•7в+49в²=4а²+28ав+49в²

Answer 2

${(2a + 7b)}^{2} = 4 {a}^{2} + 28ab + 49 {b}^{2}$

Answer 3

To square the expression (2а + 7в)², you need to multiply it by itself:

(2а + 7в)² = (2а + 7в) * (2а + 7в)

To calculate this, you can use the FOIL method (First, Outer, Inner, Last):

(2а + 7в) * (2а + 7в) = 2а * 2а + 2а * 7в + 7в * 2а + 7в * 7в

Now, simplify each term:

1. 2а * 2а = 4а²
2. 2а * 7в = 14ав
3. 7в * 2а = 14ав
4. 7в * 7в = 49в²

Putting it all together, we have:

(2а + 7в)² = 4а² + 14ав + 14ав + 49в²

Now, combine like terms:

(2а + 7в)² = 4а² + 28ав + 49в²

So, the square of the expression (2а + 7в) is 4а² + 28ав + 49в².