Question

FIND A - 2B IF A = 2x square +4x +3 and B = 5x square + 3.

sorry to write square form in writen​

Answer 1

Answer:

2x^2+4x+3- 2((5x^2)+3)

=2x^2+4x+3- 10x^2-6

=-8x^2+4x-3.

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Answer 2

⍟GIVEN:-

$\tt \bull A = 2 {x}^{2} + 4x + 3$

$\tt \bull B = 5 {x}^{2} + 3$

⍟FIND:-

$\tt \bull A - 2B = ?$

⍟SOLUTION:-

we have,

$\tt ⭄ A - 2B ......(i)$

where,

$\tt ⤏ A = 2 {x}^{2} + 4x + 3$

$\tt ⤏B = 5 {x}^{2} + 3$

substitute these values of A and B in eq. first.

$\tt ➟ A - 2B$

$\tt ➟ 2 {x}^{2} + 4x + 3 - 2(5 {x}^{2} + 3)$

$\tt➟2 {x}^{2} + 4x + 3 - 10 {x}^{2} - 6$

$\tt➟8 {x}^{2} + 4x - 3$

$\tt☃Hence, \underline{ \boxed{ \bold{ A - 2B = 8 {x}^{2} + 4x - 3 }}}$