Question

answer this question plz

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plz plz​

Answer 1

Answer:

3) x²+14x+49

4) 9x²-21x-8

Step-by-step explanation:

3) (x+7) (x+7)

= x²+7x+7x+49

= x²+14x+49

4) (3x+1) (3x-8)

= 9x²-24x+3x-8

= 9x²-21x-8

Answer 2

$\underline{\underline{\textsf{\maltese\:\: Concept Implemented :}}}$

● (a + b)² = a² + b² + 2ab

● (a - b)² = a² + b² - 2ab

● (a + b) (a - b) = a² - b²

● (x + a) (x + b) = x² + (a + b)x + ab

$\underline{\underline{\textsf{\maltese\:\: Question 3:}}}$

(x + 7)(x + 7)

$\underline{\underline{\textsf{\maltese\:\: Solution :}}}$

(x + 7)(x + 7)

= x² + 7² + (2 * x * 7)

= x² + 49 + 14x

$\underline{\underline{\textsf{\maltese\:\: Question 4 :}}}$

(3x + 1) (3x - 8)

$\underline{\underline{\textsf{\maltese\:\: Solution :}}}$

(3x + 1) (3x - 8)

= (3x)² + {1 + (-8)}3x + (1 * -8)

= 9x² + (-7)3x + (-8)

= 9x² - 21x - 8

$\underline{\underline{\textsf{\maltese\:\: Learn more from Brainly :}}}$

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