Question

Factorise.
(1) x² + 9x + 18
(4) 5y2 + 5y - 10
(7) m- 23m + 120
(10) 2x2 + x - 45​

Answer 1

${x}^{2} + 9x + 18 \\ {x}^{2} + 6x + 3x + 18 \\ x(x + 6) + 3(x + 6) \\ (x + 6)(x + 3)$

${5y}^{2} + 5y - 10 \\ {5y}^{2} - 5y + 10y - 10 \\ 5y(y- 1) + 10(y - 1) \\ (y - 1)(5y + 10)$

${m}^{2} - 23m + 120 \\ {m}^{2} - 8m - 15m + 120 \\ m(m - 8) - 15(m - 8) \\ (m - 8)(m - 15)$

${2x}^{2} + x - 45 \\ {2x}^{2} + 10x - 9x - 45 \\ 2x(x + 5) - 9(x + 5) \\ (x + 5)(2x - 9)$

$<marquee>MARK BRAINLIEST$