Question

(2x+3) ²= 25 please give me answer argently​

Answer 1

Answer:

Step-by-step explanation:

(2x+3)² = 25

(a+b)² = a²+b²+2ab

(2x+3)² = (2x)²+3²+2*2x*3

4x²+9+12x

4x²+12x+9 = 25

4x²+12x = 25-9

4x²+12x = 16

Divide the whole equation by 4,

x²+3x = 4

x²+3x-4=0

b²-4ac = 3²-4*1*-4

9+16 = 25

-b±√b²-4ac / 2a

-3±√25 / 2*1

-3±5 /2

-3+5/2 = 2/2 = 1

-3-5/2 = -8/2 = -4.

∴Values of x are 1 and -4.

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