Question

factorise? solve the problem?? ​

Answer 1

Question number 16:-

$1 - (b - c)^{2}$

$= (1)^{2} - (b - c)^{2}$

$= (1 + b - c)(1 - b + c)$

Question number 17:-

$(2a + 3b)^{2} - 16 {c}^{2}$

$= (2a + 3b)^{2} - (4c)^{2}$

$= (2a + 3b - 4c)(2a + 3b + 4c)$

Question number 18:-

$(1 + m)^{2} - (1 - m)^{2}$

$= (1 + m + 1 - m)(1 + m - 1 + m)$

$= 2(2m)$

$= 4m$

Question number 19:-

$(2x + 5y)^{2} - 1$

$= (2x + 5y)^{2} - (1)^{2}$

$= (2x + 5y + 1)(2x + 5y - 1)$

Question number 20:-

$36 {c}^{2} - (5a + b)^{2}$

$= (6c)^{2} - (5a + b)^{2}$

$= (6c + 5a + b)(6c - 5a - b)$

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