1)
2)
it is a sum from the chapter factorisation
Anonymous:
what to do ??
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1)x² + 6xy + 9y² + x + 3y
= x² + 2.x.3y + (3y)² +( x + 3y ) {using (a + b)² = a² + b² + 2ab}
= (x + 3y)² + ( x + 3y )
= ( x + 3y )( x + 3y + 1) ANSWER
2) 4a² - 12ab + 9b² + 4a - 6b
= (2a)² - 2.2a.3b + (3b)² + 2(2a - 3b) {using (a + b)² = a² + b² + 2ab}
= (2a - 3b)² + 2(2a - 3b)
= (2a + 3b)(2a - 3b + 2) ANSWER
= x² + 2.x.3y + (3y)² +( x + 3y ) {using (a + b)² = a² + b² + 2ab}
= (x + 3y)² + ( x + 3y )
= ( x + 3y )( x + 3y + 1) ANSWER
2) 4a² - 12ab + 9b² + 4a - 6b
= (2a)² - 2.2a.3b + (3b)² + 2(2a - 3b) {using (a + b)² = a² + b² + 2ab}
= (2a - 3b)² + 2(2a - 3b)
= (2a + 3b)(2a - 3b + 2) ANSWER
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