Question

four important identities :
no copy paste

Answer 1

Answer:

$\huge\sf \underline{identities : }$

$\sf (i) \: \: \: \: \: \: \: {(x + y)}^{2}$

$\sf \to {x}^{2} + 2xy + {y}^{2}$

$\sf (ii) \: \: \: \: \: \: \: \: {(x - y)}^{2}$

$\sf \to {x}^{2} - 2xy + {y}^{2}$

$\sf (iii) \: \: \: \: \: \: \: {x}^{2} - {y}^{2}$

$\sf \to (x + y)(x - y)$

$\sf (iv) \: \: \: \: \: \: \: \: (x + a)(x + b)$

$\sf \to {x}^{2} + x(a + b) + ab$

Answer 2

Answer:

hey dear here your answer ⛄

Step-by-step explanation:

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$

${(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

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

$(x + a)(x + b) = {x}^{2} + (a + b)x + ab$

HOPE IT WILL HELP YOU ⛄