Question

Expand and simplify each:
1) (y+5)²
2) (a-2)²
3) (z+6)(z+8)
Please answer urgently and explain correctly.
Thank you.

Answer 1

Hey mate!

Here is your answer > >

1. (y+5)^2

We know that

(a+b)^2=a^2+b^2+2ab

Here, a is y and b is 5

(y+5)^2=y^2+5^2+2×y×5=y^2+25+10y

2.(a-2)^2

We know that

(a-b)^2=a^2+b^2-2ab

Here a is a only and b is 2

(a-2)^2=a^2+2^2-2×a×2=a^2+4-4a

3. (z+6)(z+8)

We know that

(a+x)(a+y)=a^2+(x+y) a+xy

So, (z+6)(z+8)=z^2+(6+8)×z+6×8=z^2+14z+48

Hope it helps!

Thankyou ☆ ☆

Bebrainly