Answer:
if step by step math then just add 1+2=3 but we can do it easy way your answer would be 2045
Step-by-step explanation:
10^2x²-3=10^9-x²
by comparison,
2x²-3=9-x²
3x²=12
x²=4
x= 2 or -2
S = 40w + 450
Step-by-step explanation:2 and 4
