Question

expand [2y-3z]whole square

Answer 1

Answer:

4y2 +9z2-12yz is the answer

Answer 2

Answer:

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Step-by-step explanation:

(2y-3z)²

(a-b)²= a²+b²-2ab

here a = 2y , b= 3z

(2y -3z)² = 4y² + 9z² - 2(2y -3z)

4y² + 9z² - 4y +6z

rearranging the terms :-)

4y² - 4y + 9z² + 6z

taking common terms :-)

4y( y - 1) + 3z(3z +2)

(4y+3z ) ( ( y-1 ) (3z+2))