Question

The area of square abcd is 7cm^2

show that x^2+4x=3

Answer 1

(x + 2)² = 7

x² + 4x + 4 = 7

x² + 4x = 3

Explanation:

Answer 2

see explanation

Explanation:

The area (A) of the square = s² ( s is the measure of the side )

Here s = x + 2 and A = 7 , thus

(x + 2)² = 7 ← expand left side using FOIL

x² + 4x + 4 = 7 ( subtract 4 from both sides )

x² + 4x = 3 ← as required