Question

Please help me with full explanation.

And a request to everyone I'm having my online exam from 21st so if I give any questions please answer it with correct answer
@kimtaehyung21 please​

Answer 1

see the attachment for your answer

good morning my lovely sweet sister

how r u doing?

have a nice day ♾️

all the best for your exam

hope it will help you

Answer 2

Step-by-step explanation:

1)

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$$= ({a}^{2} + 2ab + {b}^{2} ) \times (a + b)$

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$$= ({a}^{2} + 2ab + {b}^{2} ) \times (a + b)$$= a( {a}^{2} + 2ab + {b}^{2} ) \\ \: \: \: \: \: \: + b( {a}^{2} + 2ab + {b}^{2} )$

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$$= ({a}^{2} + 2ab + {b}^{2} ) \times (a + b)$$= a( {a}^{2} + 2ab + {b}^{2} ) \\ \: \: \: \: \: \: + b( {a}^{2} + 2ab + {b}^{2} )$$= {a}^{3} + 2 {a}^{2} b + a {b}^{2} + {a}^{2} b + 2a {b}^{2} + {b}^{3}$

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$$= ({a}^{2} + 2ab + {b}^{2} ) \times (a + b)$$= a( {a}^{2} + 2ab + {b}^{2} ) \\ \: \: \: \: \: \: + b( {a}^{2} + 2ab + {b}^{2} )$$= {a}^{3} + 2 {a}^{2} b + a {b}^{2} + {a}^{2} b + 2a {b}^{2} + {b}^{3}$$= {a}^{3} + 3 {a}^{2} b + 3a {b}^{2} + {b}^{3}$

${(a + b) }^{3} = {(a + b)}^{2} \times (a + b)$$= ({a}^{2} + 2ab + {b}^{2} ) \times (a + b)$$= a( {a}^{2} + 2ab + {b}^{2} ) \\ \: \: \: \: \: \: + b( {a}^{2} + 2ab + {b}^{2} )$$= {a}^{3} + 2 {a}^{2} b + a {b}^{2} + {a}^{2} b + 2a {b}^{2} + {b}^{3}$$= {a}^{3} + 3 {a}^{2} b + 3a {b}^{2} + {b}^{3}$2) similarly second solution