Question

find the following by using identity 1
a. (2x+5)^2
b. (0.2x+1.5y)^2
please solve in full method do it fast it's urgent

Answer 1

(2x+5)^2
(a+b)^2=a^2+2ab+b^2
a=2x,b=5
(2x+5)^2=(2x)^2+2 (2x)(5)+(5)^2
=4x^2+20x+25
(0.2x+1.5y)^2
(a+b)^2=a^2+2ab+b^2
a=0.2x,b=1.5y
(0.2x+1.5y)^2
=(0.2x)^2+2 (0.2x)(1.5y)+(1.5y)^2
=0.04x^2+0.60xy+3.0y^2

Answer 2

Answer:

This is a answer

= (8x+3y) square