Question

Q9. Find the area of a square , length
of whose each side is (4x + 5) m.
Using suitable identities.​

Answer 1

Answer:

16(x^2) + 25 + 40x

Step-by-step explanation:

Area of a Sq. = Side x Side

Each Side = (4x + 5)

Area of Sq. with side (4x + 5) -

= (4x + 5)^2

= (4x + 5)(4x + 5)

= (4x)^2 + (5)^2 + 2(4x)(5)

= 16(x^2) + 25 + 40x

Answer 2

Step-by-step explanation:

area of square=s²

=(4x+5)(4x+5)

=4x(4x+5)+5(4x+5)

=16x²+20x+20x+25

=16x²+40x+25

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