B=(4+5x)² - (3x²-8)
b =16+40x+25x²-3x²+8
b= 22x²+40x+24
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Verified answer
B = (4 + 5x)² - (3x² - 8)B = 16 + 40x + 25x² - (9x² - 48x + 64)
B = 16 + 40x + 25x² - 9x² + 48x - 64
B = 25x² - 9x² + 40x + 48x + 16 - 64
B = 16x² + 88x - 48
B=(4+5x)² - (3x²-8)
b =16+40x+25x²-3x²+8
b= 22x²+40x+24