Question

expression when x=2 with 2x²+ 2x + 3
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Answer 1

Answer:

x=6

Step-by-step explanation:

Given: 2x-3=√2x²-2x+21

Squaring both the sides, we get

(2x-3)2 = 2x2-2x+21

4x2+9-12x = 2x2-2x+21

2x2-10x-12=0

x2-5x-6=0

x2-6x+x-6=0

x(x-6)+(x-6)=0

(x-6)(x+1)=0

x=6 or x=-1

x can't be negative

Hence, x=6.

Answer 2

answer :

2x^2+2x+3

2×2^2+2×2+3

2×4+4+3

8+4+3

15