19. Find the middle term of the square of (7x+3)? A. -42x B.-21x C. 21x D. 42x 20. What is the missing term in (x+3)3=x3+9x2+_____ +27?
A. -27x B. - 9x C. 9x D. 27x
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19. Find the middle term of the square of (7x+3)? A. -42x B.-21x C. 21x D. 42x 20. What is the missing term in (x+3)3=x3+9x2+_____ +27?
A. -27x B. - 9x C. 9x D. 27x
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19.) D. 42x
✎answer : 49x²+42x+9 and the middle term here is 42x
20.) D. 27x
✎ answer : x³+9x²+27x+27
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